If this is in a form: <input class="required" type="text"/>
and the form is validated with: jQuery("#demo_form").validate({meta:"validate"}); // inside $.ready Then I get this : meta is undefined file:///C:/Development/Assets/test/datetime/jquery.validate.js Line 507 Which is caused by this: return meta.messages && meta.messages[method]; I think this is a new function in the 1.4 script but I think it should check for !meta before calling 'meta.messages' : if(!meta){ return; } This fixes the bug Mike