It's not available for direct download yet, but Sierra has made the version 23115 patch for TRIBES 2 available via the game's auto-update system. Thanks Tribal War, who have posted a full list of changes on their news page. Here's an excerpt from the list of changes:

- (memory leak) Fixed a large memory leak. This plus the other leaks mentioned here should finally put the nail in the coffin on the "degrading server performance" issue.

- (improvement) Targeting laser prediction should be better now.

- (improvement) You can specify a server's IP address manually at the join screen

- (improvement) You can now specify "-password " on the command line to join a server that requires a password.

- (improvement) Heavy armors are tougher against snipers. You now require four headshots or five body shots to kill a Juggernaut with a laser rifle.

- (improvement) Footspeed of all armors increased slightly, as well as a minor boost to jetpack performance. Some improvements made to air resistance for mediums and heavy armors (very subtle).

- (improvement) The jetpack effect was reverted back to the old effect (by popular demand).