Another thing that still needs fixed , and i can't believe that it has not been fixed after 4 pathches is the pb_sv_guidrelax 7 issue.
I Run a script on our servers which changes it back to 0 , after map restarts etc, but there are many servsr out there that don't , as i see quite a few people getting kicked from our server for duplicate cd keys.
This needs to get fixed, and i know PB has changed versions a few times since cod4 launch,, which sugests to me that it is a cod4 scripting problem.