Index: /CKEditor/trunk/_source/plugins/clipboard/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/clipboard/plugin.js	(revision 7268)
+++ /CKEditor/trunk/_source/plugins/clipboard/plugin.js	(revision 7269)
@@ -296,6 +296,4 @@
 		if ( this.mode != 'wysiwyg' )
 			return;
-
-		inReadOnly = inReadOnly || this.readOnly;
 
 		this.getCommand( 'cut' ).setState( inReadOnly ? CKEDITOR.TRISTATE_DISABLED : stateFromNamedCommand( 'Cut', this ) );
Index: /CKEditor/trunk/_source/plugins/wysiwygarea/plugin.js
===================================================================
--- /CKEditor/trunk/_source/plugins/wysiwygarea/plugin.js	(revision 7268)
+++ /CKEditor/trunk/_source/plugins/wysiwygarea/plugin.js	(revision 7269)
@@ -1105,4 +1105,7 @@
 					editor.on( 'selectionChange', function( evt )
 					{
+						if ( editor.readOnly )
+							return;
+
 						var sel = editor.getSelection();
 						// Do it only when selection is not locked. (#8222)