This update will require a server update. Server admins need to update their servers before you will be able to connect to them. Also of note for clients, if you recieve an error about KF-Trader mismatch on connect, you can either change the games language to english, or delete that localized file and that should clear the issue.
Changelog:
*We have addressed a connection hang issue between clients and servers.
*Various Map Bug and Exploit fixes
*Aperture has been updated - Her chamber is now open....