Commas in regex rules breaks validation

I've also tried using \pL to get the comma character included. Still no luck.
Doesn't work: regexp[/^[0-9a-zA-Z-_.'()\/:#&\pL\"\\\ \\,]*$/]
(note double backslash because rule is in quotes.)

function MYMODULE_form_alter(&$form, &$form_state, $form_id) {
  switch ($form_id){
    case 'user_register' :
      if(module_exists('fapi_validation')) {
        $fields = array('first_name' => 40, 'last_name' => 80, 'title' => 80, 'organization' => 80);
        foreach ($fields as $fKey => $fLen) {
          $form['Profile']['profile_'.$fKey]['#rules'] = array(
            array('rule' => 'length[1, '.$fLen.']', 'error' => '%field is an invalid size (max length '.$fLen.').'),
            array('rule' => "regexp[/^[0-9a-zA-Z-_.'()\/:#&\pL\"\\\ ]*$/]",
              'error' => '%field can only include letters, numbers, and basic characters.'),
          );
          $form['About You']['profile_'.$fKey]['#filters'] = array('trim');
        }
      }
      break;
  } // end switch
}

After using this tool to test my rule against some text, I'm convinced there's a problem with this module. Seems that when there's a comma in the regex rule it ends the rule string and breaks it. The rule gets broken apart in $params. Discovered via...

function fapi_validation_rule_regexp($value, $params) {
  dsm($params[0]);
  return (bool) preg_match($params[0], (string) $value);
}

Looks like that happens here:

$params[] = preg_split('/ *, */', $rs[3]);

...which I believe is for use with length.

Ok, here's the patch.

This seems like a big deal.
Made the module not usable without the patch for fairly normal text restriction to include commas.

Awesome. Thanks. Excited to see it get in.

Switching a site to D7 soon, in case I end up needing to make the patch for that too.

bold