This version uses the old netcode by default. Clients can choose to enable/disable the new code if they like. Hitsounds are now off by default, added the enabling/disabling of behindview. Check the readme for all the info. As usuall, please post any bugs or support questions here.
Thanks TNSe and UsAaR33
Source: http://www.midnightinteractive.com/forums/showthread.php3?s=&threadid=1019
Azazel: You can get this from out UTPure downloads section
"Mac Fix" will be updated soon