Index: /FCKeditor/trunk/editor/_source/classes/fckpanel.js
===================================================================
--- /FCKeditor/trunk/editor/_source/classes/fckpanel.js	(revision 1110)
+++ /FCKeditor/trunk/editor/_source/classes/fckpanel.js	(revision 1111)
@@ -164,4 +164,8 @@
 	else
 	{
+		// Be sure we'll not have more than one Panel opened at the same time.
+		if ( FCKPanel._OpenedPanel )
+			FCKPanel._OpenedPanel.Hide() ;
+
 		// Do not fire OnBlur while the panel is opened.
 		if ( typeof( FCK.ToolbarSet.CurrentInstance.FocusManager ) != 'undefined' )
@@ -252,4 +256,6 @@
 		// Move the focus to the IFRAME so we catch the "onblur".
 		this._IFrame.contentWindow.focus() ;
+
+		FCKPanel._OpenedPanel = this ;
 	}