[kh99]

So I'm assuming that the problem is that you only want the regex errors in the error array? Maybe something like:

PHP Code:

//some code 

   function filter_field_errors($params)
   {
       if ($params[1] == 'required_field_x_missing_or_invalid')
           array_pop({$params[0]}->errors);
   }

    $vbulletin->input->clean_array_gpc('r', array( 
        'userfield' => TYPE_ARRAY, 
    )); 

    $userdata =& datamanager_init('User', $vbulletin, ERRTYPE_ARRAY); 
    $userdata->set_failure_callback('filter_field_errors');

    // set profile fields 
    $customfields = $userdata->set_userfields($vbulletin->GPC['userfield'], true, 'normal'); 

//some more code 


(BTW I haven't tried this at all, even to check for typos).