diff --git a/mailnews/base/search/src/nsMsgFilterService.cpp b/mailnews/base/search/src/nsMsgFilterService.cpp
index 6a58e60d7840..f34d9387a2a1 100644
--- a/mailnews/base/search/src/nsMsgFilterService.cpp
+++ b/mailnews/base/search/src/nsMsgFilterService.cpp
@@ -43,7 +43,7 @@
 #include "nsMsgFilterService.h"
 #include "nsFileStream.h"
 #include "nsMsgFilterList.h"
-#include "nsSpecialSystemDirectory.h"
+#include "nsDirectoryServiceDefs.h"
 #include "nsIPrompt.h"
 #include "nsIDocShell.h"
 #include "nsIMsgWindow.h"
@@ -63,6 +63,7 @@
 #include "nsIOutputStream.h"
 #include "nsIMsgComposeService.h"
 #include "nsMsgCompCID.h"
+#include "nsMsgUtils.h"
 
 NS_IMPL_ISUPPORTS1(nsMsgFilterService, nsIMsgFilterService)
 
@@ -147,11 +148,9 @@ NS_IMETHODIMP	nsMsgFilterService::SaveFilterList(nsIMsgFilterList *filterList, n
   nsCOMPtr <nsIFileSpec> realFiltersFile;
   nsCOMPtr <nsIFileSpec> parentDir;
 
-
-  nsSpecialSystemDirectory tmpFile(nsSpecialSystemDirectory::OS_TemporaryDirectory);
-  tmpFile += "tmprules.dat";
-
-  ret = NS_NewFileSpecWithSpec(tmpFile, getter_AddRefs(tmpFiltersFile));
+  ret = GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR,
+                                        "tmprules.dat",
+                                        getter_AddRefs(tmpFiltersFile));
 
   NS_ASSERTION(NS_SUCCEEDED(ret),"writing filters file: failed to append filename");
   if (NS_FAILED(ret)) 
diff --git a/mailnews/base/src/nsMessenger.cpp b/mailnews/base/src/nsMessenger.cpp
index a538c3c533b8..54289e08f929 100644
--- a/mailnews/base/src/nsMessenger.cpp
+++ b/mailnews/base/src/nsMessenger.cpp
@@ -52,8 +52,8 @@
 #include "nsReadableUtils.h"
 #include "nsIFileSpec.h"
 #include "nsILocalFile.h"
+#include "nsDirectoryServiceDefs.h"
 #include "nsISupportsObsolete.h"
-#include "nsSpecialSystemDirectory.h"
 #include "nsQuickSort.h"
 #if defined(XP_MAC) || defined(XP_MACOSX)
 #include "nsIAppleFileDecoder.h"
@@ -2992,17 +2992,14 @@ nsDelAttachListener::StartProcessing(nsMessenger * aMessenger, nsIMsgWindow * aM
   // create an output stream on a temporary file. This stream will save the modified 
   // message data to a file which we will later use to replace the existing message.
   // The file is removed in the destructor.
-  nsFileSpec * msgFileSpec = new nsFileSpec(
-    nsSpecialSystemDirectory(nsSpecialSystemDirectory::OS_TemporaryDirectory) );
-  if (!msgFileSpec) return NS_ERROR_OUT_OF_MEMORY;
-  *msgFileSpec += "nsmail.tmp";
-  msgFileSpec->MakeUnique();
-  rv = NS_NewFileSpecWithSpec(*msgFileSpec, getter_AddRefs(mMsgFileSpec));
-  nsCOMPtr<nsILocalFile> msgFile;
-  if (NS_SUCCEEDED(rv))
-    rv = NS_FileSpecToIFile(msgFileSpec, getter_AddRefs(msgFile));
-  delete msgFileSpec;
+  nsCOMPtr<nsIFile> msgFile;
+  rv = GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR, "nsmail.tmp",
+                                       getter_AddRefs(msgFile));
   NS_ENSURE_SUCCESS(rv,rv);
+
+  rv = msgFile->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 00600);
+  NS_ENSURE_SUCCESS(rv,rv);
+
   nsCOMPtr<nsIOutputStream> fileOutputStream;
   rv = NS_NewLocalFileOutputStream(getter_AddRefs(fileOutputStream), msgFile, -1, 00600);
   NS_ENSURE_SUCCESS(rv,rv);
diff --git a/mailnews/base/util/nsMsgProtocol.cpp b/mailnews/base/util/nsMsgProtocol.cpp
index cf6500ea071d..cbdbc29af958 100644
--- a/mailnews/base/util/nsMsgProtocol.cpp
+++ b/mailnews/base/util/nsMsgProtocol.cpp
@@ -43,7 +43,6 @@
 #include "nsISocketTransportService.h"
 #include "nsISocketTransport.h"
 #include "nsXPIDLString.h"
-#include "nsSpecialSystemDirectory.h"
 #include "nsILoadGroup.h"
 #include "nsIIOService.h"
 #include "nsNetUtil.h"
@@ -62,6 +61,8 @@
 #include "nsThreadUtils.h"
 #include "nsIPrefBranch.h"
 #include "nsIPrefService.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsMsgUtils.h"
 
 NS_IMPL_THREADSAFE_ADDREF(nsMsgProtocol)
 NS_IMPL_THREADSAFE_RELEASE(nsMsgProtocol)
@@ -84,9 +85,10 @@ nsMsgProtocol::nsMsgProtocol(nsIURI * aURL)
   m_readCount = 0;
   mLoadFlags = 0;
   m_socketIsOpen = PR_FALSE;
-		
-  m_tempMsgFileSpec = nsSpecialSystemDirectory(nsSpecialSystemDirectory::OS_TemporaryDirectory);
-  m_tempMsgFileSpec += "tempMessage.eml";
+
+  GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR, "tempMessage.eml",
+                                  getter_AddRefs(m_tempMsgFile));
+
   mSuppressListenerNotifications = PR_FALSE;
   InitFromURI(aURL);
 }
diff --git a/mailnews/base/util/nsMsgProtocol.h b/mailnews/base/util/nsMsgProtocol.h
index 13221330c3be..06b3b3d06c7c 100644
--- a/mailnews/base/util/nsMsgProtocol.h
+++ b/mailnews/base/util/nsMsgProtocol.h
@@ -165,7 +165,7 @@ protected:
   //PRUint32	m_startPosition;
   PRInt32       m_readCount;
 
-  nsFileSpec	m_tempMsgFileSpec;  // we currently have a hack where displaying a msg involves writing it to a temp file first
+  nsCOMPtr<nsIFile> m_tempMsgFile;  // we currently have a hack where displaying a msg involves writing it to a temp file first
 
   // auth module for access to NTLM functions
   nsCOMPtr<nsIAuthModule> m_authModule;
diff --git a/mailnews/base/util/nsMsgUtils.cpp b/mailnews/base/util/nsMsgUtils.cpp
index 105e2000d32f..d406329f598e 100644
--- a/mailnews/base/util/nsMsgUtils.cpp
+++ b/mailnews/base/util/nsMsgUtils.cpp
@@ -1221,6 +1221,47 @@ void GetSummaryFileLocation(nsFileSpec& fileLocation, nsFileSpec* summaryLocatio
   summaryLocation->SetLeafName(fileName);
 }
 
+// Gets a special directory and appends the supplied file name onto it.
+nsresult GetSpecialDirectoryWithFileName(const char* specialDirName,
+                                         const char* fileName,
+                                         nsIFile** result)
+{
+  nsresult rv = NS_GetSpecialDirectory(specialDirName, result);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return (*result)->AppendNative(nsDependentCString(fileName));
+}
+
+// XXX This function is provided temporarily whilst we are still working
+// on bug 33451 to remove nsIFileSpec from mailnews.
+nsresult GetSpecialDirectoryWithFileName(const char* specialDirName,
+                                         const char* fileName,
+                                         nsIFileSpec** result)
+{
+  nsCOMPtr<nsIFile> tmpFile;
+  nsresult rv = GetSpecialDirectoryWithFileName(specialDirName, fileName,
+                                                getter_AddRefs(tmpFile));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_NewFileSpecFromIFile(tmpFile, result);
+}
+
+// XXX This function is provided temporarily whilst we are still working
+// on bug 33451 to remove nsIFileSpec from mailnews.
+nsresult GetSpecialDirectoryWithFileName(const char* specialDirName,
+                                         const char* fileName,
+                                         nsFileSpec* result)
+{
+
+
+  nsCOMPtr<nsIFileSpec> tmpFile;
+  nsresult rv = GetSpecialDirectoryWithFileName(specialDirName, fileName,
+                                                getter_AddRefs(tmpFile));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return tmpFile->GetFileSpec(result);
+}
+
 PRBool MsgFindKeyword(const nsACString &keyword, nsACString &keywords, nsACString::const_iterator &start, nsACString::const_iterator &end)
 {
   keywords.BeginReading(start);
diff --git a/mailnews/base/util/nsMsgUtils.h b/mailnews/base/util/nsMsgUtils.h
index 1488d8ee636a..3047ce47075c 100644
--- a/mailnews/base/util/nsMsgUtils.h
+++ b/mailnews/base/util/nsMsgUtils.h
@@ -158,6 +158,24 @@ NS_MSG_BASE nsresult GetSummaryFileLocation(nsIFileSpec* fileLocation,
 // on bug 33451 to remove nsIFileSpec from mailnews.
 NS_MSG_BASE void GetSummaryFileLocation(nsFileSpec& fileLocation,
                                         nsFileSpec* summaryLocation);
+
+// Gets a special directory and appends the supplied file name onto it.
+NS_MSG_BASE nsresult GetSpecialDirectoryWithFileName(const char* specialDirName,
+                                                     const char* fileName,
+                                                     nsIFile** result);
+
+// XXX This function is provided temporarily whilst we are still working
+// on bug 33451 to remove nsIFileSpec from mailnews.
+NS_MSG_BASE nsresult GetSpecialDirectoryWithFileName(const char* specialDirName,
+                                                     const char* fileName,
+                                                     nsIFileSpec** result);
+
+// XXX This function is provided temporarily whilst we are still working
+// on bug 33451 to remove nsIFileSpec from mailnews.
+NS_MSG_BASE nsresult GetSpecialDirectoryWithFileName(const char* specialDirName,
+                                                     const char* fileName,
+                                                     nsFileSpec* result);
+
 // fills in the position of the passed in keyword in the passed in keyword list
 // and returns false if the keyword isn't present
 NS_MSG_BASE PRBool MsgFindKeyword(const nsACString &keyword, nsACString &keywords, 
diff --git a/mailnews/compose/src/nsMsgCompUtils.cpp b/mailnews/compose/src/nsMsgCompUtils.cpp
index 9aafa02c368f..2014289943c4 100644
--- a/mailnews/compose/src/nsMsgCompUtils.cpp
+++ b/mailnews/compose/src/nsMsgCompUtils.cpp
@@ -53,7 +53,7 @@
 #include "nsMsgComposeStringBundle.h"
 #include "nsXPIDLString.h"
 #include "nsReadableUtils.h"
-#include "nsSpecialSystemDirectory.h"
+#include "nsDirectoryServiceDefs.h"
 #include "nsIDocumentEncoder.h"    // for editor output flags
 #include "nsIURI.h"
 #include "nsNetCID.h"
@@ -119,12 +119,16 @@ nsMsgCreateTempFileSpec(const char *tFileName)
   if ((!tFileName) || (!*tFileName))
     tFileName = "nsmail.tmp";
 
-  nsFileSpec *tmpSpec = new nsFileSpec(nsSpecialSystemDirectory(nsSpecialSystemDirectory::OS_TemporaryDirectory));
-
-  if (!tmpSpec)
+  nsFileSpec *tmpSpec = new nsFileSpec;
+  
+  if (NS_FAILED(GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR,
+                                                tFileName,
+                                                tmpSpec)))
+  {
+    delete tmpSpec;
     return nsnull;
+  }
 
-  *tmpSpec += tFileName;
   tmpSpec->MakeUnique();
 
   return tmpSpec;
@@ -141,15 +145,28 @@ nsMsgCreateTempFileName(const char *tFileName)
   if ((!tFileName) || (!*tFileName))
     tFileName = "nsmail.tmp";
 
-  nsFileSpec tmpSpec = nsSpecialSystemDirectory(nsSpecialSystemDirectory::OS_TemporaryDirectory); 
-  tmpSpec += tFileName;
-  tmpSpec.MakeUnique();
+  nsCOMPtr<nsIFile> tmpFile;
 
-  char *tString = (char *)PL_strdup(tmpSpec.GetNativePathCString());
+  nsresult rv = GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR,
+                                                tFileName,
+                                                getter_AddRefs(tmpFile));
+  if (NS_FAILED(rv))
+    return nsnull;
+
+  rv = tmpFile->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 00600);
+  if (NS_FAILED(rv))
+    return nsnull;
+
+  nsXPIDLCString tempString;
+  rv = tmpFile->GetNativePath(tempString);
+  if (NS_FAILED(rv))
+    return nsnull;
+  
+  char *tString = (char *)PL_strdup(tempString.get());
   if (!tString)
     return PL_strdup("mozmail.tmp");  // No need to I18N
-  else
-    return tString;
+
+  return tString;
 }
 
 static PRBool mime_headers_use_quoted_printable_p = PR_FALSE;
@@ -1674,8 +1691,6 @@ msg_pick_real_name (nsMsgAttachmentHandler *attachment, const PRUnichar *propose
   nsUnescape (attachment->m_real_name);
   }
 
-  PRInt32 parmFolding = 0;
-
   /* Now a special case for attaching uuencoded files...
 
    If we attach a file "foo.txt.uu", we will send it out with
diff --git a/mailnews/compose/src/nsMsgCompose.cpp b/mailnews/compose/src/nsMsgCompose.cpp
index 8858425c9e84..b173df51a22f 100644
--- a/mailnews/compose/src/nsMsgCompose.cpp
+++ b/mailnews/compose/src/nsMsgCompose.cpp
@@ -66,7 +66,6 @@
 #include "nsMsgCompUtils.h"
 #include "nsIMsgStringService.h"
 #include "nsMsgComposeStringBundle.h"
-#include "nsSpecialSystemDirectory.h"
 #include "nsMsgSend.h"
 #include "nsMsgCreate.h"
 #include "nsMailHeaders.h"
diff --git a/mailnews/extensions/mdn/src/nsMsgMdnGenerator.cpp b/mailnews/extensions/mdn/src/nsMsgMdnGenerator.cpp
index a20baeb7f32e..ff4d1297c7a0 100644
--- a/mailnews/extensions/mdn/src/nsMsgMdnGenerator.cpp
+++ b/mailnews/extensions/mdn/src/nsMsgMdnGenerator.cpp
@@ -43,7 +43,6 @@
 #include "nsMsgMimeCID.h"
 #include "nsIMsgAccountManager.h"
 #include "nsMsgBaseCID.h"
-#include "nsSpecialSystemDirectory.h"
 #include "nsCRT.h"
 #include "nsMimeTypes.h"
 #include "prmem.h"
@@ -62,6 +61,8 @@
 #include "nsIPrefService.h"
 #include "nsIPrefBranch.h"
 #include "nsIStringBundle.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsMsgUtils.h"
 
 #define MDN_NOT_IN_TO_CC          ((int) 0x0001)
 #define MDN_OUTSIDE_DOMAIN        ((int) 0x0002)
@@ -408,12 +409,18 @@ nsresult nsMsgMdnGenerator::CreateMdnMsg()
     if (!m_reallySendMdn)
         return NS_OK;
 
-    nsSpecialSystemDirectory
-        tmpFile(nsSpecialSystemDirectory::OS_TemporaryDirectory); 
-    tmpFile += "mdnmsg";
-    tmpFile.MakeUnique();
+    
 
-    rv = NS_NewFileSpecWithSpec(tmpFile, getter_AddRefs(m_fileSpec));
+    nsCOMPtr<nsIFile> tmpFile;
+    rv = GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR,
+                                         "mdnmsg",
+                                         getter_AddRefs(tmpFile));
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = tmpFile->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 00600);
+    NS_ENSURE_SUCCESS(rv, rv);
+
+    rv = NS_NewFileSpecFromIFile(tmpFile, getter_AddRefs(m_fileSpec));
 
     NS_ASSERTION(NS_SUCCEEDED(rv),"creating mdn: failed to create");
     if (NS_FAILED(rv)) 
diff --git a/mailnews/imap/src/nsImapMailFolder.cpp b/mailnews/imap/src/nsImapMailFolder.cpp
index fec2628af0ef..3cce23ed428e 100644
--- a/mailnews/imap/src/nsImapMailFolder.cpp
+++ b/mailnews/imap/src/nsImapMailFolder.cpp
@@ -81,7 +81,6 @@
 #include "nsIDocShell.h"
 #include "nsIInterfaceRequestor.h"
 #include "nsIInterfaceRequestorUtils.h"
-#include "nsSpecialSystemDirectory.h"
 #include "nsXPIDLString.h"
 #include "nsReadableUtils.h"
 #include "nsUnicharUtils.h"
@@ -114,6 +113,7 @@
 #include "nsIMsgComposeService.h"
 #include "nsMsgCompCID.h"
 #include "nsICacheEntryDescriptor.h"
+#include "nsDirectoryServiceDefs.h"
 
 
 static NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID);
@@ -3108,16 +3108,15 @@ NS_IMETHODIMP nsImapMailFolder::BeginCopy(nsIMsgDBHdr *message)
   if (message)
     m_copyState->m_message = do_QueryInterface(message, &rv);
 
-  nsSpecialSystemDirectory tmpFileSpec(nsSpecialSystemDirectory::OS_TemporaryDirectory);
-  
-  tmpFileSpec += "nscpmsg.txt";
-  tmpFileSpec.MakeUnique();
-  rv = NS_NewFileSpecWithSpec(tmpFileSpec,
-                                getter_AddRefs(m_copyState->m_tmpFileSpec));
-  nsCOMPtr<nsILocalFile> msgFile;
-  if (NS_SUCCEEDED(rv))
-    rv = NS_FileSpecToIFile(&tmpFileSpec, getter_AddRefs(msgFile));
-  NS_ENSURE_SUCCESS(rv,rv);
+  nsCOMPtr<nsIFile> msgFile;
+  rv = GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR,
+                                       "nscpmsg.txt",
+                                       getter_AddRefs(msgFile));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = msgFile->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 00600);
+  NS_ENSURE_SUCCESS(rv, rv);
+
   nsCOMPtr<nsIOutputStream> fileOutputStream;
   rv = NS_NewLocalFileOutputStream(getter_AddRefs(fileOutputStream), msgFile, -1, 00600);
   NS_ENSURE_SUCCESS(rv,rv);
diff --git a/mailnews/imap/src/nsImapOfflineSync.cpp b/mailnews/imap/src/nsImapOfflineSync.cpp
index c9b64c544268..d29ea2ba6616 100644
--- a/mailnews/imap/src/nsImapOfflineSync.cpp
+++ b/mailnews/imap/src/nsImapOfflineSync.cpp
@@ -47,10 +47,11 @@
 #include "nsIMsgAccountManager.h"
 #include "nsINntpIncomingServer.h"
 #include "nsIRequestObserver.h"
-#include "nsSpecialSystemDirectory.h"
+#include "nsDirectoryServiceDefs.h"
 #include "nsIFileStream.h"
 #include "nsIMsgCopyService.h"
 #include "nsImapProtocol.h"
+#include "nsMsgUtils.h"
 
 static NS_DEFINE_CID(kRDFServiceCID, NS_RDFSERVICE_CID);
 
@@ -379,12 +380,17 @@ nsImapOfflineSync::ProcessAppendMsgOperation(nsIMsgOfflineImapOperation *current
     mailHdr->GetMessageOffset(&messageOffset);
     mailHdr->GetOfflineMessageSize(&messageSize);
     nsCOMPtr <nsIFileSpec>	tempFileSpec;
-    nsSpecialSystemDirectory tmpFileSpec(nsSpecialSystemDirectory::OS_TemporaryDirectory);
-    
-    tmpFileSpec += "nscpmsg.txt";
-    tmpFileSpec.MakeUnique();
-    rv = NS_NewFileSpecWithSpec(tmpFileSpec,
-      getter_AddRefs(tempFileSpec));
+    nsCOMPtr<nsIFile> tmpFile;
+
+    if (NS_FAILED(GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR,
+                                                  "nscpmsg.txt",
+                                                  getter_AddRefs(tmpFile))))
+      return;
+
+    if (NS_FAILED(tmpFile->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 00600)))
+      return;
+
+    NS_NewFileSpecFromIFile(tmpFile, getter_AddRefs(tempFileSpec));
     if (tempFileSpec)
     {
       nsCOMPtr <nsIOutputStream> outputStream;
diff --git a/mailnews/import/eudora/src/nsEudoraMac.cpp b/mailnews/import/eudora/src/nsEudoraMac.cpp
index fb7a3b4bc0b2..5f931e41a6fc 100644
--- a/mailnews/import/eudora/src/nsEudoraMac.cpp
+++ b/mailnews/import/eudora/src/nsEudoraMac.cpp
@@ -50,7 +50,7 @@
 #include "nsIImportService.h"
 #include "nsIImportMailboxDescriptor.h"
 #include "nsIImportABDescriptor.h"
-#include "nsSpecialSystemDirectory.h"
+#include "nsDirectoryServiceDefs.h"
 #include "nsEudoraStringBundle.h"
 #include "nsEudoraImport.h"
 #include "nsIPop3IncomingServer.h"
@@ -112,11 +112,20 @@ PRBool nsEudoraMac::FindEudoraLocation( nsIFileSpec *pFolder, PRBool findIni, ns
 	// "Eudora Folder" (not sure if this is true for intl versions of Eudora)
 	
 	if (!pLookIn) {
-		nsSpecialSystemDirectory	sysDir( nsSpecialSystemDirectory::Mac_SystemDirectory);
-		pFolder->SetFromFileSpec( sysDir);
+        nsCOMPtr<nsIFile> sysDir;
+        nsresult rv = NS_GetSpecialDirectory(NS_OS_SYSTEM_DIR, getter_AddRefs(sysDir));
+        if (NS_FAILED(rv))
+          return (PR_FALSE);
+
+        nsCOMPtr<nsIFileSpec> sysDirSpec;
+        rv = NS_NewFileSpecFromIFile(sysDir, getter_AddRefs(sysDirSpec));
+        if (NS_FAILED(rv))
+          return (PR_FALSE);
+
+		pFolder->FromFileSpec(sysDirSpec);
 		pFolder->AppendRelativeUnixPath( "Eudora Folder");
 		PRBool	link = PR_FALSE;
-		nsresult rv = pFolder->IsSymlink( &link);
+		rv = pFolder->IsSymlink( &link);
 		if (NS_SUCCEEDED( rv) && link) {
 			rv = pFolder->ResolveSymlink();
 			if (NS_FAILED( rv))
@@ -478,9 +487,18 @@ PRBool nsEudoraMac::CreateTocFromResource( nsIFileSpec *pMail, nsIFileSpec *pToc
 	if (resH) {
 		PRInt32 sz = (PRInt32) GetHandleSize( resH);
 		if (sz) {
-			// Create the new TOC file
-			nsSpecialSystemDirectory	dir( nsSpecialSystemDirectory::OS_TemporaryDirectory);
-			rv = pToc->SetFromFileSpec( dir);
+            // Create the new TOC file
+            nsCOMPtr<nsIFile> tempDir;
+            nsresult rv = NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(tempDir));
+            if (NS_FAILED(rv))
+              return (PR_FALSE);
+
+            nsCOMPtr<nsIFileSpec> dir;
+            rv = NS_NewFileSpecFromIFile(tempDir, getter_AddRefs(dir));
+            if (NS_FAILED(rv))
+              return (PR_FALSE);
+
+			rv = pToc->FromFileSpec( dir);
 			if (NS_SUCCEEDED( rv))
 				rv = pToc->AppendRelativeUnixPath( "temp.toc");
 			if (NS_SUCCEEDED( rv))
diff --git a/mailnews/import/eudora/src/nsEudoraMailbox.cpp b/mailnews/import/eudora/src/nsEudoraMailbox.cpp
index 1122eb2bb7b9..419301547d6a 100644
--- a/mailnews/import/eudora/src/nsEudoraMailbox.cpp
+++ b/mailnews/import/eudora/src/nsEudoraMailbox.cpp
@@ -40,9 +40,10 @@
 #include "nsCOMPtr.h"
 #include "nsReadableUtils.h"
 #include "nsEudoraMailbox.h"
-#include "nsSpecialSystemDirectory.h"
+#include "nsDirectoryServiceDefs.h"
 #include "nsEudoraCompose.h"
 #include "nspr.h"
+#include "nsMsgUtils.h"
 
 #include "EudoraDebugLog.h"
 
@@ -118,23 +119,18 @@ nsEudoraMailbox::~nsEudoraMailbox()
 
 nsresult nsEudoraMailbox::CreateTempFile( nsIFileSpec **ppSpec)
 {
-	*ppSpec = nsnull;
-	
-	nsSpecialSystemDirectory temp(nsSpecialSystemDirectory::OS_TemporaryDirectory);
-	
-	// nsSpecialSystemDirectory temp(nsSpecialSystemDirectory::Mac_DesktopDirectory);
-	
-    temp += "impmail.txt";
-	temp.MakeUnique();
-	nsresult rv = NS_NewFileSpecWithSpec( temp, ppSpec);
-    if (NS_SUCCEEDED(rv)) {
-		if (*ppSpec)
-			return( NS_OK);
-		else
-			return( NS_ERROR_FAILURE);
-	}
+  *ppSpec = nsnull;
 
-	return( rv);
+  nsCOMPtr<nsIFile> tmpFile;
+  nsresult rv = GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR,
+                                                "impmail.txt",
+                                                getter_AddRefs(tmpFile));
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = tmpFile->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 00600);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return NS_NewFileSpecFromIFile(tmpFile, ppSpec);
 }
 
 nsresult nsEudoraMailbox::DeleteFile( nsIFileSpec *pSpec)
diff --git a/mailnews/import/outlook/src/MapiMessage.cpp b/mailnews/import/outlook/src/MapiMessage.cpp
index 7d9565acb03f..6a07f5fc574c 100644
--- a/mailnews/import/outlook/src/MapiMessage.cpp
+++ b/mailnews/import/outlook/src/MapiMessage.cpp
@@ -39,7 +39,8 @@
 #include <time.h>
 #include "nsString.h"
 #include "nsFileSpec.h"
-#include "nsSpecialSystemDirectory.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsMsgUtils.h"
 
 #include "MapiDbgLog.h"
 #include "MapiApi.h"
@@ -605,14 +606,19 @@ BOOL CMapiMessage::CopyBinAttachToFile( LPATTACH lpAttach)
 	m_ownsAttachFile = FALSE;
 	m_attachPath.Truncate();
 
-        const char *tFileName = "mapiattach.tmp";
+    nsCOMPtr<nsIFile> tmpFile;
+    nsresult rv = GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR,
+                                                  "mapiattach.tmp",
+                                                  getter_AddRefs(tmpFile));
+    NS_ENSURE_SUCCESS(rv, rv);
 
-        nsFileSpec tmpSpec = nsSpecialSystemDirectory(nsSpecialSystemDirectory::OS_TemporaryDirectory); 
-        tmpSpec += tFileName;
-        tmpSpec.MakeUnique();
+    rv = tmpFile->CreateUnique(nsIFile::NORMAL_FILE_TYPE, 00600);
+    NS_ENSURE_SUCCESS(rv, rv);
 
+    nsXPIDLCString tmpPath;
+    tmpFile->GetNativePath(tmpPath);
 	HRESULT hr = CMapiApi::OpenStreamOnFile( gpMapiAllocateBuffer, gpMapiFreeBuffer, STGM_READWRITE | STGM_CREATE,
-						(char *) tmpSpec.GetNativePathCString(), NULL, &lpStreamFile);
+						(char *) tmpPath.get(), NULL, &lpStreamFile);
 	if (HR_FAILED(hr)) {
 		MAPI_TRACE1( "~~ERROR~~ OpenStreamOnFile failed - temp path: %s\r\n", tPath);
 		return( FALSE);
@@ -644,7 +650,7 @@ BOOL CMapiMessage::CopyBinAttachToFile( LPATTACH lpAttach)
 		}
 	}
 
-	m_attachPath = tmpSpec.GetNativePathCString();
+	m_attachPath = tmpPath;
 	if (lpAttachStream)
 		lpAttachStream->Release();
 	lpStreamFile->Release();
diff --git a/mailnews/local/src/nsMailboxProtocol.cpp b/mailnews/local/src/nsMailboxProtocol.cpp
index 338d81d0e0e3..be1adce30644 100644
--- a/mailnews/local/src/nsMailboxProtocol.cpp
+++ b/mailnews/local/src/nsMailboxProtocol.cpp
@@ -222,7 +222,7 @@ nsresult nsMailboxProtocol::Initialize(nsIURI * aURL)
   m_initialState = MAILBOX_READ_FOLDER;
   mCurrentProgress = 0;
   
-  NS_NewFileSpecWithSpec(m_tempMsgFileSpec, getter_AddRefs(m_tempMessageFile));
+  NS_NewFileSpecFromIFile(m_tempMsgFile, getter_AddRefs(m_tempMessageFile));
   return rv;
 }
 
diff --git a/mailnews/local/src/nsPop3Sink.cpp b/mailnews/local/src/nsPop3Sink.cpp
index a3fa82ba7aca..07c59129f5ae 100644
--- a/mailnews/local/src/nsPop3Sink.cpp
+++ b/mailnews/local/src/nsPop3Sink.cpp
@@ -59,7 +59,7 @@
 #include "nsLocalMailFolder.h"
 #include "nsIPrefBranch.h"
 #include "nsIPrefService.h"
-#include "nsSpecialSystemDirectory.h"
+#include "nsDirectoryServiceDefs.h"
 #include "nsIMsgStringService.h"
 #include "nsIPrompt.h"
 #include "nsIPromptService.h"
@@ -68,6 +68,7 @@
 #include "nsIDocShell.h"
 #include "nsIDOMWindowInternal.h"
 #include "nsEmbedCID.h"
+#include "nsMsgUtils.h"
 
 NS_IMPL_THREADSAFE_ISUPPORTS1(nsPop3Sink, nsIPop3Sink)
 
@@ -309,11 +310,10 @@ nsPop3Sink::BeginMailDelivery(PRBool uidlDownload, nsIMsgWindow *aMsgWindow, PRB
     if (m_downloadingToTempFile)
     {
       // need to create an nsIOFileStream from a temp file...
-      nsCOMPtr <nsIFileSpec> tmpDownloadFile;
-      nsSpecialSystemDirectory tmpFile(nsSpecialSystemDirectory::OS_TemporaryDirectory);
-      tmpFile += "newmsg";
-
-      rv = NS_NewFileSpecWithSpec(tmpFile, getter_AddRefs(tmpDownloadFile));
+      nsCOMPtr<nsIFileSpec> tmpDownloadFile;
+      rv = GetSpecialDirectoryWithFileName(NS_OS_TEMP_DIR,
+                                           "newmsg",
+                                           getter_AddRefs(tmpDownloadFile));
 
       NS_ASSERTION(NS_SUCCEEDED(rv),"writing tmp pop3 download file: failed to append filename");
       if (NS_FAILED(rv)) 
diff --git a/mailnews/mime/src/mimedrft.cpp b/mailnews/mime/src/mimedrft.cpp
index 231867ac6a47..85daacc1c28b 100644
--- a/mailnews/mime/src/mimedrft.cpp
+++ b/mailnews/mime/src/mimedrft.cpp
@@ -72,7 +72,7 @@
 #include "nsIMsgComposeService.h"
 #include "nsMsgI18N.h"
 #include "nsNativeCharsetUtils.h"
-#include "nsSpecialSystemDirectory.h"
+#include "nsDirectoryServiceDefs.h"
 #include "nsIMsgMessageService.h"
 #include "nsMsgUtils.h"
 #include "nsXPIDLString.h"
@@ -121,12 +121,22 @@ nsFileSpec *
 nsMsgCreateTempFileSpec(const char *tFileName)
 {
   //Calling NS_MsgHashIfNecessary so that when Replies are forwarded - the ':' in the subject line doesn't cause problems
-  nsFileSpec *tmpSpec = new nsFileSpec(nsSpecialSystemDirectory(nsSpecialSystemDirectory::OS_TemporaryDirectory));
-  NS_ASSERTION(tmpSpec, "out of memory");
+  nsCOMPtr<nsIFile> tmpFile;
+  nsresult rv = NS_GetSpecialDirectory(NS_OS_TEMP_DIR, getter_AddRefs(tmpFile));
+  if (NS_FAILED(rv))
+    return nsnull;
+
+  nsCOMPtr<nsIFileSpec> tmpFileSpec;
+  rv = NS_NewFileSpecFromIFile(tmpFile, getter_AddRefs(tmpFileSpec));
+
+  if (NS_FAILED(rv))
+    return nsnull;
+  
+  nsFileSpec *tmpSpec = new nsFileSpec;
+  tmpFileSpec->GetFileSpec(tmpSpec);
   if (!tmpSpec)
     return nsnull;
 
-  nsresult rv = NS_OK;
   nsCAutoString tempName;
   if ((!tFileName) || (!*tFileName)) {
     tempName = SAFE_TMP_FILENAME;
diff --git a/mailnews/mime/src/mimemoz2.cpp b/mailnews/mime/src/mimemoz2.cpp
index 3fa494c5d3cf..d2f2a2f9d141 100644
--- a/mailnews/mime/src/mimemoz2.cpp
+++ b/mailnews/mime/src/mimemoz2.cpp
@@ -67,7 +67,6 @@
 #include "nsStreamConverter.h"
 #include "nsIMsgSend.h"
 #include "nsIMsgMailNewsUrl.h"
-#include "nsSpecialSystemDirectory.h"
 #include "mozITXTToHTMLConv.h"
 #include "nsCExternalHandlerService.h"
 #include "nsIMIMEService.h"
diff --git a/mailnews/news/src/nsNNTPProtocol.h b/mailnews/news/src/nsNNTPProtocol.h
index 8aa5169cc013..57ea613afbf7 100644
--- a/mailnews/news/src/nsNNTPProtocol.h
+++ b/mailnews/news/src/nsNNTPProtocol.h
@@ -55,7 +55,6 @@
 #include "nsIMsgWindow.h"
 
 #include "nsMsgLineBuffer.h"
-#include "nsSpecialSystemDirectory.h"
 #include "nsXPIDLString.h"
 #include "nsIStringBundle.h"
 #include "nsITimer.h"