Index: /CKEditor/branches/versions/3.3.x/CHANGES.html
===================================================================
--- /CKEditor/branches/versions/3.3.x/CHANGES.html	(revision 5446)
+++ /CKEditor/branches/versions/3.3.x/CHANGES.html	(revision 5447)
@@ -74,4 +74,5 @@
 		<li><a href="http://dev.fckeditor.net/ticket/5578">#5578</a> : Add flash fake element align property when switch mode (source to wysiwyg).</li>
 		<li><a href="http://dev.fckeditor.net/ticket/5577">#5578</a> : Update delete column behavior when choose mutiple cells in the same column.</li>
+		<li><a href="http://dev.fckeditor.net/ticket/5577">#5562</a> : [IE] Unable to have "contentEditable:false" in effect in IE8 stricts mode.</li>
 	</ul>
 	<h3>
Index: /CKEditor/branches/versions/3.3.x/_source/plugins/wysiwygarea/plugin.js
===================================================================
--- /CKEditor/branches/versions/3.3.x/_source/plugins/wysiwygarea/plugin.js	(revision 5446)
+++ /CKEditor/branches/versions/3.3.x/_source/plugins/wysiwygarea/plugin.js	(revision 5447)
@@ -490,4 +490,5 @@
 						if ( CKEDITOR.env.ie )
 						{
+							domDocument.getDocumentElement().addClass( domDocument.$.compatMode );
 							// Override keystrokes which should have deletion behavior
 							//  on control types in IE . (#4047)
@@ -787,4 +788,9 @@
 				});
 
+			// IE8 stricts mode doesn't have 'contentEditable' in effect
+			// on element unless it has layout. (#5562)
+			if ( CKEDITOR.env.ie8 )
+				editor.addCss( 'html.CSS1Compat [contenteditable=false]{ min-height:0 !important;}' );
+
 			// Switch on design mode for a short while and close it after then.
 			function blinkCursor()