diff --git a/mailnews/news/public/nsINNTPArticleList.h b/mailnews/news/public/nsINNTPArticleList.h
index 37cf979eeca9..c6a84341a093 100644
--- a/mailnews/news/public/nsINNTPArticleList.h
+++ b/mailnews/news/public/nsINNTPArticleList.h
@@ -20,9 +20,6 @@
     { 0xB7, 0xEB, 0x00, 0x80, 0x5F, 0x05, 0xFF, 0xA5 }}
 
 class nsINNTPArticleList : public nsISupports {
- private:
-  void operator delete(void *); // NOT TO BE IMPLEMENTED
-
  public: 
   static const nsIID& IID() {
     static nsIID iid = NS_INNTPARTICLELIST_IID;
diff --git a/mailnews/news/public/nsINNTPCategoryContainer.h b/mailnews/news/public/nsINNTPCategoryContainer.h
index 61b6887074c9..0def9bc2d193 100644
--- a/mailnews/news/public/nsINNTPCategoryContainer.h
+++ b/mailnews/news/public/nsINNTPCategoryContainer.h
@@ -19,7 +19,6 @@
 
 class nsINNTPCategoryContainer : public nsISupports {
  private:
-  void operator delete(void *); // NOT TO BE IMPLEMENTED
 
  public: 
   static const nsIID& IID() {
diff --git a/mailnews/news/public/nsINNTPHost.h b/mailnews/news/public/nsINNTPHost.h
index b596b96a98de..3e17d6841a09 100644
--- a/mailnews/news/public/nsINNTPHost.h
+++ b/mailnews/news/public/nsINNTPHost.h
@@ -20,9 +20,7 @@
 
 class nsINNTPHost : public nsISupports {
  private:
-  void operator delete(void *); // NOT TO BE IMPLEMENTED
-
- public: 
+  public: 
   static const nsIID& IID() {
     static nsIID iid = NS_INNTPHOST_IID;
     return iid;
diff --git a/mailnews/news/public/nsINNTPNewsgroup.h b/mailnews/news/public/nsINNTPNewsgroup.h
index 5a146c21fa06..392c7df093df 100644
--- a/mailnews/news/public/nsINNTPNewsgroup.h
+++ b/mailnews/news/public/nsINNTPNewsgroup.h
@@ -19,7 +19,6 @@
 
 class nsINNTPNewsgroup : public nsISupports {
  private:
-  void operator delete(void *); // NOT TO BE IMPLEMENTED
 
  public: 
   static const nsIID& IID() {
@@ -28,42 +27,42 @@ class nsINNTPNewsgroup : public nsISupports {
   }
 
   /*  <IDL>  */
-  NS_IMETHOD GetName(char * *aName) = 0;
+  NS_IMETHOD GetName(char * *aName) const = 0;
   NS_IMETHOD SetName(char * aName) = 0;
 
   /*  <IDL>  */
-  NS_IMETHOD GetPrettyName(char * *aPrettyName) = 0;
+  NS_IMETHOD GetPrettyName(char * *aPrettyName) const = 0;
   NS_IMETHOD SetPrettyName(char * aPrettyName) = 0;
 
   /*  <IDL>  */
-  NS_IMETHOD GetPassword(char * *aPassword) = 0;
+  NS_IMETHOD GetPassword(char * *aPassword) const = 0;
   NS_IMETHOD SetPassword(char * aPassword) = 0;
 
   /*  <IDL>  */
-  NS_IMETHOD GetUsername(char * *aUsername) = 0;
+  NS_IMETHOD GetUsername(char * *aUsername) const = 0;
   NS_IMETHOD SetUsername(char * aUsername) = 0;
 
   /*  <IDL>  */
-  NS_IMETHOD GetNeedsExtraInfo(PRBool *aNeedsExtraInfo) = 0;
+  NS_IMETHOD GetNeedsExtraInfo(PRBool *aNeedsExtraInfo) const = 0;
   NS_IMETHOD SetNeedsExtraInfo(PRBool aNeedsExtraInfo) = 0;
 
   /*  <IDL>  */
   NS_IMETHOD IsOfflineArticle(PRInt32 num, PRBool *_retval) = 0;
 
   /*  <IDL>  */
-  NS_IMETHOD GetCategory(PRBool *aCategory) = 0;
+  NS_IMETHOD GetCategory(PRBool *aCategory) const = 0;
   NS_IMETHOD SetCategory(PRBool aCategory) = 0;
 
   /*  <IDL>  */
-  NS_IMETHOD GetSubscribed(PRBool *aSubscribed) = 0;
+  NS_IMETHOD GetSubscribed(PRBool *aSubscribed) const = 0;
   NS_IMETHOD SetSubscribed(PRBool aSubscribed) = 0;
 
   /*  <IDL>  */
-  NS_IMETHOD GetWantNewTotals(PRBool *aWantNewTotals) = 0;
+  NS_IMETHOD GetWantNewTotals(PRBool *aWantNewTotals) const = 0;
   NS_IMETHOD SetWantNewTotals(PRBool aWantNewTotals) = 0;
 
   /*  <IDL>  */
-  NS_IMETHOD GetNewsgroupList(nsINNTPNewsgroupList * *aNewsgroupList) = 0;
+  NS_IMETHOD GetNewsgroupList(nsINNTPNewsgroupList * *aNewsgroupList) const = 0;
   NS_IMETHOD SetNewsgroupList(nsINNTPNewsgroupList * aNewsgroupList) = 0;
 
   /*  <IDL>  */
diff --git a/mailnews/news/public/nsINNTPNewsgroupList.h b/mailnews/news/public/nsINNTPNewsgroupList.h
index d144de62996e..c45200403ac0 100644
--- a/mailnews/news/public/nsINNTPNewsgroupList.h
+++ b/mailnews/news/public/nsINNTPNewsgroupList.h
@@ -17,9 +17,6 @@
     { 0xB7, 0xEA, 0x00, 0x80, 0x5F, 0x05, 0xFF, 0xA5 }}
 
 class nsINNTPNewsgroupList : public nsISupports {
- private:
-  void operator delete(void *); // NOT TO BE IMPLEMENTED
-
  public: 
   static const nsIID& IID() {
     static nsIID iid = NS_INNTPNEWSGROUPLIST_IID;