Index: /CKEditor/trunk/CHANGES.html
===================================================================
--- /CKEditor/trunk/CHANGES.html	(revision 4525)
+++ /CKEditor/trunk/CHANGES.html	(revision 4526)
@@ -73,4 +73,5 @@
 		<li><a href="http://dev.fckeditor.net/ticket/4200">#4200</a> : Fixed unable to insert 'password' type filed with attributes.</li>
 		<li><a href="http://dev.fckeditor.net/ticket/4530">#4530</a> : Fixed context menu couldn't open in Opera.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/4536">#4536</a> : Fixed keyboard navigation doesn't work at all in IE quirks mode.</li>
 	<h3>
 		CKEditor 3.0.1</h3>
Index: /CKEditor/trunk/_source/plugins/floatpanel/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/floatpanel/plugin.js	(revision 4525)
+++ /CKEditor/trunk/_source/plugins/floatpanel/plugin.js	(revision 4526)
@@ -150,5 +150,5 @@
 					focused.on( 'blur', function( ev )
 						{
-							if ( CKEDITOR.env.ie && !this.allowBlur() )
+							if ( !this.allowBlur() )
 								return;
 
@@ -240,8 +240,6 @@
 									}
 								}
-								if ( CKEDITOR.env.ie && CKEDITOR.env.quirks )
-									iframe.focus();
-								else
-									iframe.$.contentWindow.focus();
+								
+								iframe.$.contentWindow.focus();
 
 								// We need this get fired manually because of unfired focus() function.