I've just noticed that, with MB installed, the #post form now has a novalidate attribute which it never had before. This now means that when custom attributes are set to 'required' for fields they get ignoreed. It also has the knock-on effect of making a custom validation plugin we created to extend the standard functionality to deal with visible/invisible fields is now useless.
Can this new 'novalidate' tag be removed please to allow standard validation to continue to work? If not, can you suggest a way to allow fields with the required attribute to continue to be validated in the normal way?