QuickForm element group validation question

Hi, I have a question about validation when grouping elements in an HTML_Quickform. Here’s the situation: I have a quickform that has a subset of elements that are grouped using the $form->addGroup() method. After the user submits the form, I have a function that iterates through the values in the $_POST array and uses that information to construct either an update or insert statement that gets sent to the db. This function, at present, requires that the values in the $_POST array are “flat”, ie no nested arrays. When you leave out the name parameter to the addGroup function, it doesn’t create nested arrays when filling out the $_POST array: it’s flat, which makes me very happy. The problem arises when I try and validate one of the elements in a group. The normal addRule() method doesn’t appear to work when you simply give it the grouped element name as a parameter. The addGroupRule() function works as advertised, but you need to pass it a group name, which means that I have to give my addGroup() calls a name, which means I no longer have flat $_POST arrays. When I leave out the group name from the addGroupRule I get a weird error about not finding HTML_QuickForm_Header::getElementName in QuickForm.php line 1051. I expect I’m not supposed to do that. I’d really rather not make my $_POST iterator function smarter to deal with nested arrays unless I have to. Does anyone have any suggestions as to how I can get the look and feel of element groups (an advcheckbox and a text element side-by-side), allow validation of one of those elements (the text element), and get a flat $_POST array? Thanks in advance for any help, LJ