The patch fixes a broad range of exploits: No longer will gamers be able to hide under the stairs on the River map; use a two-handed weapon with a shield; fire a weapon while "roadie-running" (a.k.a. "crabwalking"); or gain unlimited Lancer ammo, among many other fixes.
Epic issued general fixes including improvements with client-side hit detection of the shotgun and addressed respawning and animation problems.
The developer also made balancing adjustments to grenades, flamethrowers and respawning.
Also part of the patch are seven new Achievements related to downloadable content, equaling 175 points.
Details of the expansive update can be viewed here.