Index: /FCKeditor/branches/features/floating_dialog/editor/fckdialog.html
===================================================================
--- /FCKeditor/branches/features/floating_dialog/editor/fckdialog.html	(revision 1227)
+++ /FCKeditor/branches/features/floating_dialog/editor/fckdialog.html	(revision 1228)
@@ -266,6 +266,8 @@
 		}
 
-		var iInnerHeight = innerDoc.compatMode == 'BackCompat' ? innerDoc.body.scrollHeight : innerDoc.documentElement.scrollHeight ;
-		var iInnerWidth = innerDoc.compatMode == 'BackCompat' ? innerDoc.body.scrollWidth : innerDoc.documentElement.scrollWidth ;
+		var iInnerHeight = ( innerDoc.compatMode || 'BackCompat' ) == 'BackCompat' ? 
+			innerDoc.body.scrollHeight : innerDoc.documentElement.scrollHeight ;
+		var iInnerWidth = ( innerDoc.compatMode || 'BackCompat' ) == 'BackCompat' ? 
+			innerDoc.body.scrollWidth : innerDoc.documentElement.scrollWidth ;
 		frmMain.style.height = iInnerHeight + 'px' ;
 		frmMain.style.width = iInnerWidth + 'px' ;