As Bowling has pointed out before (and details in this forum post on the subject), the patch is set to remedy the following (you might need a pillow for all of this pure, unbridled excitement:
- Care Package, Emergency Airdrop, and Sentry Gun marker grenades sprint speed normalized.
- Fix for "infinite care package" exploit.
- Sentry Guns: Improved placement detection, preventing cases of Sentry Guns inside geometry.
- Model 1887: Bling using Akimbo and FMJ combination now has same range and damage as non-Bling Model 1887s.
- Fixes to prevent various XP hacks.
[Via Game Informer]