uhmmm in this case the fastest things to do are 2 (only one or both):
- testing your server with all the proof-of-concept related to the quake 3 engine (search quake on
http://aluigi.org/adv.htm)
- patching your server with all the unofficial fixes related to the quake 3 engine:
http://aluigi.org/patches.htm#quake3