[El_Muerte]

ah... figures.. ok here's a fix. Replace the content of the "/me main" plugin with:

if (!function_exists("bbcode_irc_me"))
{
  $bbcode_irc_me_parser = null;

  function bbcode_irc_me($username, $text)
  {
    global $bbcode_irc_me_parser, $vbulletin;
    if ($bbcode_irc_me_parser == null)
      $bbcode_irc_me_parser =& new vB_BbCodeParser($vbulletin, fetch_tag_list());

    $mask = $bbcode_irc_me_parser->tag_list["option"]["action"]["html"];
    $res = str_replace(array("%2\$s", "%1\$s"), array($username, $text), $mask);
    return $res;
  }
}

$ircme_pattern = "/(^|\s)\/me ([^\r\n]+)/is";

the produced HTML however isn't validator valid, but shouldn't produce rendering issues.

or install the newer product .xml