diff --git a/src/core/codeconvert.h b/src/core/codeconvert.h
index 1829fd0..085f6c6 100644
--- a/src/core/codeconvert.h
+++ b/src/core/codeconvert.h
@@ -117,10 +117,9 @@ class iCodeConverter
 
     protected:
 
-        iCodeConverter() 
-        {
-        };
-
+        iCodeConverter() {}
+        virtual ~iCodeConverter() {}
+    
     private:
 
         static iCodeConverter* CreateConverter();
@@ -170,7 +169,7 @@ class cIconvConverter : public iCodeConverter
         virtual int  Convert( ntdbs_t, size_t, const_ntmbs_t, size_t );
 
         cIconvConverter();
-        ~cIconvConverter();
+        virtual ~cIconvConverter();
 
     private:
         void Init();
@@ -189,7 +188,7 @@ class cDoubleIconvConverter : public iCodeConverter
         virtual int  Convert( ntdbs_t, size_t, const_ntmbs_t, size_t );
 
         cDoubleIconvConverter();
-        ~cDoubleIconvConverter();
+        virtual ~cDoubleIconvConverter();
 
     private:
 
@@ -221,6 +220,8 @@ class cWcharIs32BitUcs2Converterer : public iCodeConverter
 public:    
     virtual int  Convert( ntmbs_t, size_t, const_ntdbs_t, size_t );
     virtual int  Convert( ntdbs_t, size_t, const_ntmbs_t, size_t );
+    
+    virtual ~cWcharIs32BitUcs2Converterer() {}
 };
 
 #endif // WCHAR_IS_32_BITS
@@ -239,6 +240,8 @@ class cWcharIs16BitUcs2Converterer : public iCodeConverter
 public:    
     virtual int  Convert( ntmbs_t, size_t, const_ntdbs_t, size_t );
     virtual int  Convert( ntdbs_t, size_t, const_ntmbs_t, size_t );
+    
+    virtual ~cWcharIs16BitUcs2Converterer() {}
 };
 
 #endif // WCHAR_IS_16_BITS
@@ -250,6 +253,8 @@ class cGoodEnoughConverterer : public iCodeConverter
 public:    
     virtual int  Convert( ntmbs_t, size_t, const_ntdbs_t, size_t );
     virtual int  Convert( ntdbs_t, size_t, const_ntmbs_t, size_t );
+    
+    virtual ~cGoodEnoughConverterer() {}
 };
 
 
diff --git a/src/core/serializable.h b/src/core/serializable.h
index f9e61a2..e8fc794 100644
--- a/src/core/serializable.h
+++ b/src/core/serializable.h
@@ -82,9 +82,7 @@ public:
 	virtual void Write(iSerializer* pSerializer) const	= 0;				// throw (eSerializer, eArchive)
 		// objects implement these methods to read and write themselves to a serializer. 
 
-    #ifdef _SUNPRO
-    ~iSerializable();
-    #endif
+    virtual ~iSerializable() {}
 };
 
 class iTypedSerializable : public iTyped, public iSerializable
@@ -101,9 +99,7 @@ public:
 	static int16 MajorVersion(int32 version) { return (int16)((uint32)version >> 16); }
 	static int16 MinorVersion(int32 version) { return (int16)version; }
 
-    #ifdef _SUNPRO
-    ~iTypedSerializable();
-    #endif
+    virtual ~iTypedSerializable() {}
 };
 
 //////////////////////////////
diff --git a/src/core/serializer.h b/src/core/serializer.h
index ec7ffcc..5d03b69 100644
--- a/src/core/serializer.h
+++ b/src/core/serializer.h
@@ -155,6 +155,8 @@ public:
         E_OUTPUT_STREAM_FORMAT	= 706,
 		E_NUMITEMS
 	};
+    
+    virtual ~iSerializer() {}
 };
 
 
diff --git a/src/core/twlimits.h b/src/core/twlimits.h
index 1182ad0..5625b59 100644
--- a/src/core/twlimits.h
+++ b/src/core/twlimits.h
@@ -88,6 +88,9 @@ private:
     //
     virtual int GetMax() { return LIMIT_MAX; };
     virtual int GetMin() { return LIMIT_MIN; };
+
+public:
+    virtual ~cInterpretInt() {}
 };
 
 ///////////////////////////////////////////////
@@ -104,6 +107,9 @@ private:
 
     virtual int GetMax() { return LIMIT_MAX; };
     virtual int GetMin() { return LIMIT_MIN; };
+
+public:
+    virtual ~cSeverityLimits() {}
 };
 
 ///////////////////////////////////////////////
@@ -120,6 +126,9 @@ private:
     
     virtual int GetMax() { return LIMIT_MAX; };
     virtual int GetMin() { return LIMIT_MIN; };
+
+public:
+    virtual ~cRecurseDepthLimits() {}
 };
 
 #endif //__TWLIMITS_H
diff --git a/src/core/typed.h b/src/core/typed.h
index f32afbc..470e964 100644
--- a/src/core/typed.h
+++ b/src/core/typed.h
@@ -62,9 +62,7 @@ public:
 		// (b) returning that object in their implementation of GetType()
 		// You can use the macros below to simplify the process
 
-    #ifdef _SUNPRO
-    ~iTyped();
-    #endif
+    virtual ~iTyped() {}
 };
 
 //////////////////////////////////////////////
diff --git a/src/fco/fconameinfo.h b/src/fco/fconameinfo.h
index efee64a..4b9b687 100644
--- a/src/fco/fconameinfo.h
+++ b/src/fco/fconameinfo.h
@@ -47,6 +47,7 @@ class iFCONameInfo
 public:
 	virtual bool	IsCaseSensitive()				const = 0;
 	virtual TCHAR	GetDelimitingChar()				const = 0;
+    virtual ~iFCONameInfo() {}
 };
 
 
diff --git a/src/fco/fconametranslator.h b/src/fco/fconametranslator.h
index 2e01c32..fa221d8 100644
--- a/src/fco/fconametranslator.h
+++ b/src/fco/fconametranslator.h
@@ -82,6 +82,8 @@ public:
     virtual bool DisplayStringToFCOName( const TSTRING& str, cFCOName& name ) const = 0;    
         // this function converts strings from FCONameToDisplayString back into an fconame
         // returns false if can't convert.
+    
+    virtual ~iFCONameTranslator() {}
 };
 
 #endif //__FCONAMETRANSLATOR_H
diff --git a/src/fco/fcospec.h b/src/fco/fcospec.h
index f4b6f09..c0b55e2 100644
--- a/src/fco/fcospec.h
+++ b/src/fco/fcospec.h
@@ -56,6 +56,8 @@ class iFCOSpecHelper;
 class iFCOSpec : public iSerRefCountObj
 {
 public:
+    virtual ~iFCOSpec() {}
+    
 	virtual const TSTRING& GetName() const = 0;
 		// returns the name of this FCOSpec
 	virtual void SetName(const TSTRING& name) = 0;
@@ -120,13 +122,14 @@ public:
 class iFCOSpecMask
 {
 public:
-	virtual const TSTRING& GetName() const = 0;
+    virtual ~iFCOSpecMask() {}
+    virtual const TSTRING& GetName() const = 0;
 		// return the name of this mask
 
-	virtual bool Accept(const iFCO* pFCO) const = 0;
+    virtual bool Accept(const iFCO* pFCO) const = 0;
 		// returns true if the fco matches the criterion in the SpecMask
 
-	static const iFCOSpecMask* GetDefaultMask();
+    static const iFCOSpecMask* GetDefaultMask();
 		// returns the "default mask" that all iFCOSpecs must have. The default
 		// mask matches every FCO and is called "Default". There is no need to 
 		// destroy the returned pointer
@@ -136,7 +139,7 @@ public:
 // inline implementation
 inline const cFCOPropVector& iFCOSpec::GetPropVector(const iFCO* pFCO) const
 {
-	return GetPropVector(GetSpecMask(pFCO));
+    return GetPropVector(GetSpecMask(pFCO));
 }
 
 
diff --git a/src/fs/fsfactory.cpp b/src/fs/fsfactory.cpp
index 297faad..ef6bed5 100644
--- a/src/fs/fsfactory.cpp
+++ b/src/fs/fsfactory.cpp
@@ -59,6 +59,8 @@ public:
 	{
 		return _T('/');
 	}
+    
+    virtual ~cUnixNameInfo() {}
 };
 
 
diff --git a/src/fs/fsnametranslator.h b/src/fs/fsnametranslator.h
index 2fce030..889bfd9 100644
--- a/src/fs/fsnametranslator.h
+++ b/src/fs/fsnametranslator.h
@@ -58,6 +58,8 @@ public:
 	virtual TSTRING ToStringAPI( const cFCOName& name ) const;
     virtual TSTRING ToStringDisplay( const cFCOName& name, bool bUnique = false ) const;
     virtual bool DisplayStringToFCOName( const TSTRING& str, cFCOName& name ) const;
+    
+    virtual ~cFSNameTranslator() {}
 };
 
 #endif //__FSNAMETRANSLATOR_H
diff --git a/src/tripwire/mailmessage.h b/src/tripwire/mailmessage.h
index d080aaa..302aff0 100644
--- a/src/tripwire/mailmessage.h
+++ b/src/tripwire/mailmessage.h
@@ -150,8 +150,9 @@ public:
 
 class iMimeEncoding
 {
-    public:
-
+public:
+        virtual ~iMimeEncoding() {}
+    
         virtual
         std::string 
         Encode( const std::string& sIn, 
@@ -173,7 +174,9 @@ class iMimeEncoding
 // TODO:BAM -- convert ToBase64 to Encode
 class cBase64Encoding : public iMimeEncoding
 {
-    public:
+public:
+        virtual ~cBase64Encoding() {}
+    
         virtual
         std::string 
         Encode( const std::string& sIn, 
@@ -191,7 +194,9 @@ class cBase64Encoding : public iMimeEncoding
 
 class cQuotedPrintableEncoding : public iMimeEncoding
 {
-    public:
+public:
+        virtual ~cQuotedPrintableEncoding() {}
+    
         virtual
         std::string 
         Encode( const std::string& sIn, 
diff --git a/src/twprint/twprintcmdline.h b/src/twprint/twprintcmdline.h
index bbc46ba..95ef256 100644
--- a/src/twprint/twprintcmdline.h
+++ b/src/twprint/twprintcmdline.h
@@ -121,6 +121,8 @@ public:
 		// Returns a TSTRING that describes specific usage for a derived mode.
 	virtual cTWPrintCmdLine::CmdLineArgs GetModeID() = 0;
     virtual void SetConfigFile( TSTRING configFilePath ) = 0;
+    
+    virtual ~iTWMode() {}
 };
 
 ///////////////////////////////////////////////////////////////////////////////