diff --git a/harbour/ChangeLog b/harbour/ChangeLog
index 338a1d6f6b..6e5c802533 100644
--- a/harbour/ChangeLog
+++ b/harbour/ChangeLog
@@ -16,6 +16,12 @@
    The license applies to all entries newer than 2009-04-28.
 */
 
+2011-02-07 10:19 UTC+0100 Viktor Szakats (harbour.01 syenar.hu)
+  * contrib/hbmxml/hbmxml.hbx
+  * contrib/hbexpat/hbexpat.hbx
+  * contrib/hbcomm/hbcomm.hbx
+    * Removed duplicates using clean build.
+
 2011-02-06 20:22 UTC+0100 Viktor Szakats (harbour.01 syenar.hu)
   * contrib/hbnetio/utils/hbnetio/netiosrv.prg
   * contrib/hbnetio/utils/hbnetio/netiocon.prg
diff --git a/harbour/contrib/hbcomm/hbcomm.hbx b/harbour/contrib/hbcomm/hbcomm.hbx
index fd5507f1ce..777ea14ca4 100644
--- a/harbour/contrib/hbcomm/hbcomm.hbx
+++ b/harbour/contrib/hbcomm/hbcomm.hbx
@@ -26,20 +26,12 @@
 #endif
 
 DYNAMIC INBUFSIZE
-DYNAMIC INBUFSIZE
-DYNAMIC INCHR
 DYNAMIC INCHR
 DYNAMIC INIT_PORT
-DYNAMIC INIT_PORT
-DYNAMIC ISWORKING
 DYNAMIC ISWORKING
 DYNAMIC OUTBUFCLR
-DYNAMIC OUTBUFCLR
-DYNAMIC OUTBUFSIZE
 DYNAMIC OUTBUFSIZE
 DYNAMIC OUTCHR
-DYNAMIC OUTCHR
-DYNAMIC UNINT_PORT
 DYNAMIC UNINT_PORT
 
 #if defined( __HBEXTREQ__ ) .OR. defined( __HBEXTERN__HBCOMM__REQUEST )
diff --git a/harbour/contrib/hbexpat/hbexpat.hbx b/harbour/contrib/hbexpat/hbexpat.hbx
index d3cd478de8..ce2d7d93d7 100644
--- a/harbour/contrib/hbexpat/hbexpat.hbx
+++ b/harbour/contrib/hbexpat/hbexpat.hbx
@@ -27,7 +27,6 @@
 
 DYNAMIC HB_XML_EXPATVERSIONINFO
 DYNAMIC HB_XML_GET_UNICODE_TABLE
-DYNAMIC HB_XML_GET_UNICODE_TABLE
 DYNAMIC XML_DEFAULTCURRENT
 DYNAMIC XML_ERRORSTRING
 DYNAMIC XML_EXPATVERSION
@@ -78,7 +77,6 @@ DYNAMIC XML_SETXMLDECLHANDLER
 DYNAMIC XML_STOPPARSER
 DYNAMIC XML_USEFOREIGNDTD
 DYNAMIC __HB_XML_CDPU16MAP
-DYNAMIC __HB_XML_CDPU16MAP
 
 #if defined( __HBEXTREQ__ ) .OR. defined( __HBEXTERN__HBEXPAT__REQUEST )
    #uncommand DYNAMIC <fncs,...> => EXTERNAL <fncs>
diff --git a/harbour/contrib/hbmxml/hbmxml.hbx b/harbour/contrib/hbmxml/hbmxml.hbx
index 1d960b5e13..6a87b69dcf 100644
--- a/harbour/contrib/hbmxml/hbmxml.hbx
+++ b/harbour/contrib/hbmxml/hbmxml.hbx
@@ -35,7 +35,6 @@ DYNAMIC MXMLELEMENTDELETEATTR
 DYNAMIC MXMLELEMENTGETATTR
 DYNAMIC MXMLELEMENTSETATTR
 DYNAMIC MXMLELEMENTSETATTRF
-DYNAMIC MXMLELEMENTSETATTRF
 DYNAMIC MXMLENTITYGETNAME
 DYNAMIC MXMLENTITYGETVALUE
 DYNAMIC MXMLFINDELEMENT
@@ -71,7 +70,6 @@ DYNAMIC MXMLNEWOPAQUE
 DYNAMIC MXMLNEWREAL
 DYNAMIC MXMLNEWTEXT
 DYNAMIC MXMLNEWTEXTF
-DYNAMIC MXMLNEWTEXTF
 DYNAMIC MXMLNEWXML
 DYNAMIC MXMLREMOVE
 DYNAMIC MXMLSAVEALLOCSTRING
@@ -89,7 +87,6 @@ DYNAMIC MXMLSETOPAQUE
 DYNAMIC MXMLSETREAL
 DYNAMIC MXMLSETTEXT
 DYNAMIC MXMLSETTEXTF
-DYNAMIC MXMLSETTEXTF
 DYNAMIC MXMLSETUSERDATA
 DYNAMIC MXMLSETWRAPMARGIN
 DYNAMIC MXMLWALKNEXT