vendor/assets/javascripts/webshims/shims/form-shim-extend2.js in webshims-rails-1.12.2 vs vendor/assets/javascripts/webshims/shims/form-shim-extend2.js in webshims-rails-1.12.3

@@ -261,10 +261,10 @@
 							return ret ? !webshims.data(this, 'groupedisabled') : ret;
 						}
 					},
 					removeAttr: {
 						value: function(){
-							desc.set.call(this, false);
+							desc.prop.set.call(this, false);
 						}
 					} 
 				});
 			});