Index: /FCKeditor/trunk/editor/_source/internals/fck_gecko.js
===================================================================
--- /FCKeditor/trunk/editor/_source/internals/fck_gecko.js	(revision 609)
+++ /FCKeditor/trunk/editor/_source/internals/fck_gecko.js	(revision 610)
@@ -42,5 +42,8 @@
 	{
 		if ( FCK._MouseDownFlag )
+		{
+			FCK._MouseDownFlag = false ;
 			return ;
+		}
 		if ( FCKConfig.ForcePasteAsPlainText )
 		{
Index: /FCKeditor/trunk/editor/_source/internals/fck_ie.js
===================================================================
--- /FCKeditor/trunk/editor/_source/internals/fck_ie.js	(revision 609)
+++ /FCKeditor/trunk/editor/_source/internals/fck_ie.js	(revision 610)
@@ -99,5 +99,8 @@
 {
 	if ( FCK._MouseDownFlag )
+	{
+		FCK._MouseDownFlag = false ;
 		return ;
+	}
 	var evt = FCK.EditorWindow.event ;
 	if ( FCKConfig.ForcePasteAsPlainText )