A post on the Killing Floor Website has just been posted that an update for the game is now available and can be automatically downloaded through Steam

The Update Includes:


Fixes:

    * Fixed a memory leak causing performance to degrade the longer you played when in multiplayer (resulting in very low framerate sometimes in the final waves).
    * Improved texture and file precaching to reduce issues with hitching.
    * Voice Over IP is now usable in the Lobby Menu while waiting for everyone to ready up.
    * Cash amount in the Trader Menu updates when someone gives you money while trading.
    * Improved the readability of chat fonts.
    * All melee weapons now have an alt-fire, which is a "power strike".
    * Fixed the timing for when damage occurs from melee weapons.
    * Added a Map White List which will now only allow perks to be earned on official and approved custom maps (Makes maps such as KF-Leveling worthless).
    * Fixed "Connection Failed" endless loop when failing to connect to a server and clicking the Back button in the Server Browser.
    * Fixed Zeds sliding instead of animating online at particular times.
    * Fixed blowing off the limbs of live Zeds, such as the Bloat’s legs.
    * Added random moving attacks for specimens that would always just stop and attack before (Bloat, Gorefast, Scrake). This makes the attacks less predictable, and players can no longer just backpedel to escape any attack from these Zeds.
    * New Scrake behavior - the Scrake will now rage sooner, and will now keep moving toward its target when attacking. Additionally, it will randomly charge at its target when attacking, making the Scrake more effective.
    * Added improved behavior for FleshPound to prevent "kiting". The Fleshpound will now get frustrated and charge players regardless of if it is shot if players keep moving away from it.
    * Fixed Joining as Spectator not allowing you to View players.
    * Fixed Spectators needing to "Ready" before game will start.
    * Improved some of the fonts for in-game messages and interface text.
    * Interface tweaks


Perk Tweaks:

    * Decreased Shotgun Penetration power of the Support Perk
    * Increased Ammo Capacity of Bullpup for Commando Perk
    * Increased the Reload speed bonus of the Commando Perk
    * Decreased the Stalker Kills requirement of the Commando Perk
    * Decreased Lever Action Rifle cocking time for the Sharpshooter Perk
    * Assigned 9mm to Sharpshooter Perk(9mm headshots count toward Perk and all bonuses now apply to 9mm as well)
    * Reduced movement speed for Medic Perk to deter "kiting"
    * Increased Reload Speed for Firebug Perk
    * Increased Ammo Capacity of FlameThrower for Firebug Perk