Activision sends along the v1.2 patch for Quake 4, which is pretty much the 1.1 patch but with the widescreen bug found in that release fixed. If you did have 1.1 installed, there is an incremental patch available too.

We really mean it this time... The QUAKE 4 1.2 Point Release is now available. This update replaces the 1.1 patch released several weeks ago, and includes all of the changes outlined for that update, including: a fixed pure server system, a new AddonPak autodownloading system, voice chat in multiplayer, a forcemodel option, brightskins, smooth stairjumping, a one-minute warning for tournament matches, Hyper-Threading Technology and Dual Core support as well as a number of multiplayer specific fixes. For a complete list of changes, please see the readme. The full 1.2 update will bring ANY previous version of the game completely up to date, and it includes the 4 new professionally made multiplayer maps as well as the QUAKEMAS multiplayer map pack.