Quickform::updateAttributes() quirk

Hi, I'm having trouble getting attribute values to persist in the $_POST array during successive failures of a rule (eg, re-posting the form). The problem must be that I have all the elements in an array, eg: user[firstname] user[lastname] ... The above works fine but when <select> or radio values are introduced, by default as a sub-array, they are lost in $_POST. I believe this part of Quickform's functionality is handled by HTML_Common::_parseAttributes() and HTML_Common::_updateAttrArray() Anyone have any ideas if there's any way to overcome this? cheers, Demian