Ticket #3450: 3450.patch

_source/plugins/styles/plugin.js

@@ -1003 +1014 @@
                 // retrieving its final format.
                 var tempSpan = document.createElement( 'span' );
                 tempSpan.style.cssText = unparsedCssText;
-                return tempSpan.style.cssText;
+                // IE is missing a semicolon at end.
+                return tempSpan.style.cssText + ( CKEDITOR.env.ie ? ';' : '' );
         }
 
         // valueA is our internal "for comparison" value.