diff --git a/mailnews/mime/src/mimecms.cpp b/mailnews/mime/src/mimecms.cpp
index d99b5010d74..c7644ffa536 100644
--- a/mailnews/mime/src/mimecms.cpp
+++ b/mailnews/mime/src/mimecms.cpp
@@ -74,11 +74,12 @@ extern int SEC_ERROR_CERT_ADDR_MISMATCH;
 static int
 MimeEncryptedCMSClassInitialize(MimeEncryptedCMSClass *clazz)
 {
+#ifdef DEBUG
   MimeObjectClass    *oclass = (MimeObjectClass *)    clazz;
-  MimeEncryptedClass *eclass = (MimeEncryptedClass *) clazz;
-
   NS_ASSERTION(!oclass->class_initialized, "1.2 <mscott@netscape.com> 01 Nov 2001 17:59");
+#endif
 
+  MimeEncryptedClass *eclass = (MimeEncryptedClass *) clazz;
   eclass->crypto_init          = MimeCMS_init;
   eclass->crypto_write         = MimeCMS_write;
   eclass->crypto_eof           = MimeCMS_eof;
@@ -260,7 +261,7 @@ MimeCMSHeadersAndCertsMatch(MimeObject *obj,
 	s = MimeHeaders_get(msg_headers, HEADER_FROM, PR_FALSE, PR_FALSE);
 	if (s)
 	  {
-		int n = ParseRFC822Addresses(s, getter_Copies(from_name), getter_Copies(from_addr));
+		ParseRFC822Addresses(s, getter_Copies(from_name), getter_Copies(from_addr));
 		PR_FREEIF(s);
 	  }
 
@@ -268,7 +269,7 @@ MimeCMSHeadersAndCertsMatch(MimeObject *obj,
 	s = MimeHeaders_get(msg_headers, HEADER_SENDER, PR_FALSE, PR_FALSE);
 	if (s)
 	  {
-		int n = ParseRFC822Addresses(s, getter_Copies(sender_name), getter_Copies(sender_addr));
+		ParseRFC822Addresses(s, getter_Copies(sender_name), getter_Copies(sender_addr));
 		PR_FREEIF(s);
 	  }
   }
diff --git a/mailnews/mime/src/mimemcms.cpp b/mailnews/mime/src/mimemcms.cpp
index eb0f7819cf2..f4902914f74 100644
--- a/mailnews/mime/src/mimemcms.cpp
+++ b/mailnews/mime/src/mimemcms.cpp
@@ -337,7 +337,6 @@ MimeMultCMS_sig_init (void *crypto_closure,
 						MimeHeaders *signature_hdrs)
 {
   MimeMultCMSdata *data = (MimeMultCMSdata *) crypto_closure;
-  MimeDisplayOptions *opts = multipart_object->options;
   char *ct;
   int status = 0;
   nsresult rv;
diff --git a/mailnews/mime/src/mimemdig.cpp b/mailnews/mime/src/mimemdig.cpp
index 7ef5004e135..8a72307509d 100644
--- a/mailnews/mime/src/mimemdig.cpp
+++ b/mailnews/mime/src/mimemdig.cpp
@@ -46,9 +46,11 @@ MimeDefClass(MimeMultipartDigest, MimeMultipartDigestClass,
 static int
 MimeMultipartDigestClassInitialize(MimeMultipartDigestClass *clazz)
 {
+#ifdef DEBUG  
   MimeObjectClass    *oclass = (MimeObjectClass *)    clazz;
-  MimeMultipartClass *mclass = (MimeMultipartClass *) clazz;
   PR_ASSERT(!oclass->class_initialized);
+#endif
+  MimeMultipartClass *mclass = (MimeMultipartClass *) clazz;
   mclass->default_part_type = MESSAGE_RFC822;
   return 0;
 }
diff --git a/mailnews/mime/src/mimemmix.cpp b/mailnews/mime/src/mimemmix.cpp
index 30afebe4ee9..9d34407456a 100644
--- a/mailnews/mime/src/mimemmix.cpp
+++ b/mailnews/mime/src/mimemmix.cpp
@@ -45,7 +45,9 @@ MimeDefClass(MimeMultipartMixed, MimeMultipartMixedClass,
 static int
 MimeMultipartMixedClassInitialize(MimeMultipartMixedClass *clazz)
 {
+#ifdef DEBUG
   MimeObjectClass *oclass = (MimeObjectClass *) clazz;
   PR_ASSERT(!oclass->class_initialized);
+#endif
   return 0;
 }
diff --git a/mailnews/mime/src/mimemoz2.cpp b/mailnews/mime/src/mimemoz2.cpp
index c5f4f4bacab..61974f30f1e 100644
--- a/mailnews/mime/src/mimemoz2.cpp
+++ b/mailnews/mime/src/mimemoz2.cpp
@@ -526,7 +526,6 @@ MimeGetAttachmentList(MimeObject *tobj, const char *aMessageURL, nsMsgAttachment
   MimeObject            *obj;
   MimeContainer         *cobj;
   PRInt32               n;
-  PRBool                isAlternativeOrRelated = PR_FALSE;
   PRBool                isAnInlineMessage;
 
   if (!data) 
@@ -707,13 +706,6 @@ SetMailCharacterSetToMsgWindow(MimeObject *obj, const char *aCharacterSet)
   return rv;
 }
 
-static char *
-mime_reformat_date(const char *date, void *stream_closure)
-{
-  /*  struct mime_stream_data *msd = (struct mime_stream_data *) stream_closure; */
-  return nsCRT::strdup(date);
-}
-
 static char *
 mime_file_type (const char *filename, void *stream_closure)
 {
diff --git a/mailnews/mime/src/mimempar.cpp b/mailnews/mime/src/mimempar.cpp
index 315b2b7a373..b3c5ace162a 100644
--- a/mailnews/mime/src/mimempar.cpp
+++ b/mailnews/mime/src/mimempar.cpp
@@ -45,7 +45,9 @@ MimeDefClass(MimeMultipartParallel, MimeMultipartParallelClass,
 static int
 MimeMultipartParallelClassInitialize(MimeMultipartParallelClass *clazz)
 {
+#ifdef DEBUG
   MimeObjectClass *oclass = (MimeObjectClass *) clazz;
   PR_ASSERT(!oclass->class_initialized);
+#endif
   return 0;
 }
diff --git a/mailnews/mime/src/mimetenr.cpp b/mailnews/mime/src/mimetenr.cpp
index c5ed544f5f6..3a5c5577a15 100644
--- a/mailnews/mime/src/mimetenr.cpp
+++ b/mailnews/mime/src/mimetenr.cpp
@@ -50,9 +50,11 @@ MimeDefClass(MimeInlineTextEnriched, MimeInlineTextEnrichedClass,
 static int
 MimeInlineTextEnrichedClassInitialize(MimeInlineTextEnrichedClass *clazz)
 {
+#ifdef DEBUG
   MimeObjectClass *oclass = (MimeObjectClass *) clazz;
-  MimeInlineTextRichtextClass *rclass = (MimeInlineTextRichtextClass *) clazz;
   PR_ASSERT(!oclass->class_initialized);
+#endif
+  MimeInlineTextRichtextClass *rclass = (MimeInlineTextRichtextClass *) clazz;
   rclass->enriched_p = PR_TRUE;
   return 0;
 }