[]I don't know how that can happen, unless the send_message function in your ubbt.inc.php has also been modified.[/]
Well, if YOU don't know how it can happen.... and no this hack is the only one that has been added to the ubbt.inc.php file, then I surely don't know.
I'm simply reporting what has happened. If you would prefer I didn't report any such anomalies with any of your hacks, just say the word and I'll keep silent.

Jeff