diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index baaaaaeb00..3d9e4d8b7e 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -16,6 +16,32 @@
    The license applies to all entries newer than 2009-04-28.
 */
 
+2012-06-17 11:41 UTC+0200 Viktor Szakats (harbour syenar.net)
+  * contrib/hbtip/encoder.prg
+  * contrib/hbtip/encqp.prg
+    % use hb_default()
+
+  * contrib/hbtip/encqp.prg
+    ! fixed RTE when using TIPEncoderQP class from a dynamically loaded hbtip.
+      It has been reported long time ago, so now I hacked a local
+      solution which simply removes inherition from this class,
+      which works around the problem. Hopefully the core can get
+      the fixes to allow derived classes to be used from dynamic libs
+      and this can be reverted. In this case only one variable was
+      inherited, so it was easy to do. BTW I was trying to use hb_MailAssemble()
+      from a script which triggered this.
+      TOFIX: Self contained example (tested on win/mingw):
+             --- hbmk2 test.hb
+             #require "hbtip"
+             PROCEDURE Main()
+                TIPEncoderBase64():New()
+             --- ->
+             Error BASE/3003  Cannot find super class 'TIPENCODER': __CLSINSTSUPER
+             Called from __CLSINSTSUPER(0)
+             Called from HBCLASS:CREATE(0)
+             Called from TIPENCODERBASE64(0)
+             ---
+
 2012-06-17 11:23 UTC+0200 Viktor Szakats (harbour syenar.net)
   * contrib/hbtip/encqp.prg
   * contrib/hbtip/hbtip.hbx
diff --git a/harbour/contrib/hbtip/encoder.prg b/harbour/contrib/hbtip/encoder.prg
index f27e177040..21157b1900 100644
--- a/harbour/contrib/hbtip/encoder.prg
+++ b/harbour/contrib/hbtip/encoder.prg
@@ -65,9 +65,7 @@
 FUNCTION TIp_GetEncoder( cModel )
    LOCAL oEncoder
 
-   IF ! HB_ISSTRING( cModel )
-      cModel := "as-is"
-   ENDIF
+   hb_default( @cModel, "as-is" )
 
    cModel := Lower( cModel )
 
@@ -101,9 +99,7 @@ CREATE CLASS TIPEncoder
 ENDCLASS
 
 METHOD New( cModel ) CLASS TIPEncoder
-   IF ! HB_ISSTRING( cModel )
-      cModel := "as-is"
-   ENDIF
+   hb_default( @cModel, "as-is" )
    ::cName := cModel
    RETURN Self
 
diff --git a/harbour/contrib/hbtip/encqp.prg b/harbour/contrib/hbtip/encqp.prg
index a95c62f1cd..4df35e87d3 100644
--- a/harbour/contrib/hbtip/encqp.prg
+++ b/harbour/contrib/hbtip/encqp.prg
@@ -52,7 +52,14 @@
 
 #include "hbclass.ch"
 
-CREATE CLASS TIPEncoderQP FROM TIPEncoder
+/* TOFIX: Removed TIPEncode as parent class to make it
+          work from a dynamically loaded hbtip library.
+          'VAR cName' was the only inherited item/logic.
+          This should be reverted once derived classes
+          work fine from dynamically loaded libs. */
+CREATE CLASS TIPEncoderQP
+   VAR cName
+
    METHOD New() CONSTRUCTOR
    METHOD Encode( cData )
    METHOD Decode( cData )