@Shado: sorry, I can't reproduce the error. I registered in your forum, sent myself 2 PMs, and I'm not even getting a popup window (tried Firefox and IE). Since you don't have a "standard" phpBB but an entirely modiefied one, it could have many reasons why my MOD's not working for you. The changes you made to the files were correct.
Hmm...just added the mod by hand without the use of easy mod..and it's not working?? I'm running 2.0.20? Does this mod not work for the latest version. I'm using the AcidEx skin...so I just did the mod in the template I'm using...other then that everything else is the same? PM are still opening in the main window?