Valve have issued the following press release regarding the Xbox 360 version of Left 4 Dead, addressing associated reports of blatant cheating, namely allowing safe rooms to be filled with Witches.

"Valve has released a server-side fix to deny the recently reported cheats on all dedicated Left 4 Dead Xbox 360 servers. The fix is designed to halt the cheating behaviour on the dedicated servers, which accounts for the majority of the co-op and Versus modes of play. A title update for those playing on user-hosted servers and/or via system link will be released in the coming days."