form-shim-extend.js in webshims-rails-1.14.5

- old
+ new

@@ -390,10 +390,10 @@
 						image: 1
 					}
 				;
 				return function(){
 					var elem = $(this).getNativeElement()[0];
-					return !!(!elem.readOnly && !types[elem.type] && !$(elem).is(':disabled') );
+					return !!(!elem.readOnly && !types[elem.type] && !$.find.matchesSelector(elem, ':disabled') );
 				};
 			})()
 		},
 		validity: {
 			writeable: false,