Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 6085)
+++ /CKEditor/trunk/CHANGES.html	(revision 6086)
@@ -50,4 +50,5 @@
 		<li><a href="http://dev.ckeditor.com/ticket/6656">#6656</a> : Panelbutton's buttons became active when clicking on source.</li>
 		<li><a href="http://dev.ckeditor.com/ticket/5404">#5404</a> : Whitespaces (NBSP) were incorrectly added into empty table cells and list items.</li>
+		<li><a href="http://dev.ckeditor.com/ticket/6575">#6575</a> : Tabs disappearing in Link dialog after specific action sequence.</li>
 	</ul>
 	<h3>
Index: /CKEditor/trunk/_source/plugins/dialog/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/dialog/plugin.js	(revision 6085)
+++ /CKEditor/trunk/_source/plugins/dialog/plugin.js	(revision 6086)
@@ -1030,5 +1030,5 @@
 		{
 			var tab = this._.tabs[id] && this._.tabs[id][0];
-			if ( !tab || this._.pageCount == 1 )
+			if ( !tab || this._.pageCount == 1 || !tab.isVisible() )
 				return;
 			// Switch to other tab first when we're hiding the active tab.