Kingpin to version 1.21 (patches any version below v1.21).
The patch improves network code and a couple miscellaneous bugs.
Changes:
-20% Bandwidth reduction
-Added more spawn points to team_towers
-Fixed spawning inside teammates
-Fixed button cheating in team_rival
If you would like to play some Kingpin multiplayer there are games on every Thursday starting at 9.30pm UK time and Sunday night starting at 9pm UK time (mainly Death Match, Hitmen mod and Bagman but sometimes other mods such as CTF too) . The games go for 2 - 3 hours or more. It's a friendly crowd and all new players are welcome :)
Just grab the updated Kingpin server browser from Gamefront.com