I was wrong about this issue in my previous post.
Unofficial Solution:
FIND in /mkportal/modules/urlobox/index.php:
$message = preg_replace('/\[URL=(.+?)\](.+)\[\/URL\]/',$no_url,$message);
$message = preg_replace('/\[IMG\](.+?)\[\/IMG\]/',$no_img,$message);
REPLACE WITH:
$message = preg_replace('/\[URL=(.+?)\](.+)\[\/URL\]/i',$no_url,$message);
$message = preg_replace('/\[IMG\](.+?)\[\/IMG\]/i',$no_img,$message);
-=DKC=-
