Index: /CKEditor/branches/features/readonly/_source/plugins/sourcearea/plugin.js
===================================================================
--- /CKEditor/branches/features/readonly/_source/plugins/sourcearea/plugin.js	(revision 6755)
+++ /CKEditor/branches/features/readonly/_source/plugins/sourcearea/plugin.js	(revision 6756)
@@ -42,5 +42,5 @@
 							textarea.addClass( 'cke_enable_context_menu' );
 
-							editor.readOnly && textarea.setAttribute( 'readonly', 'readonly' );
+							editor.readOnly && textarea.setAttribute( 'readOnly', 'readonly' );
 
 							var styles =
@@ -155,7 +155,7 @@
 				{
 					if ( editor.readOnly )
-						editor.textarea.setAttribute( 'readonly', 'readonly' );
+						editor.textarea.setAttribute( 'readOnly', 'readonly' );
 					else
-						editor.textarea.removeAttribute( 'readonly' );
+						editor.textarea.removeAttribute( 'readOnly' );
 				}
 			});