Index: trunk/admin/editor/cmseditor/editor/_source/classes/fcktoolbarspecialcombo.js
===================================================================
diff -u -r1697 -r1746
--- trunk/admin/editor/cmseditor/editor/_source/classes/fcktoolbarspecialcombo.js	(.../fcktoolbarspecialcombo.js)	(revision 1697)
+++ trunk/admin/editor/cmseditor/editor/_source/classes/fcktoolbarspecialcombo.js	(.../fcktoolbarspecialcombo.js)	(revision 1746)
@@ -81,7 +81,10 @@
 		if ( eState == FCK_TRISTATE_DISABLED )
 		{
 			this._Combo.DeselectAll() ;
-			this._Combo.SetLabel(FCKConfig.DefaultClass) ;
+			if (typeof(FCKConfig.DefaultClass) != 'undefined')
+				this._Combo.SetLabel(FCKConfig.DefaultClass) ;
+			else
+				this._Combo.SetLabel(' ') ;
 		}
 		// Sets the actual state.
 		this.State = eState ;
@@ -99,6 +102,9 @@
 {
 	this.State = FCK_TRISTATE_DISABLED ;
 	this._Combo.DeselectAll() ;
-	this._Combo.SetLabel(FCKConfig.DefaultClass) ;
+	if (typeof(FCKConfig.DefaultClass) != 'undefined')
+		this._Combo.SetLabel(FCKConfig.DefaultClass) ;
+	else
+		this._Combo.SetLabel(' ') ;
 	this._Combo.SetEnabled( false ) ;
 }
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