id has just issued the following warning regarding the Quake IV 1.1 beta patch: “There is a problem with the widescreen functionality that may harm a user’s monitor. We are working on a re-release and will make it available as soon as possible. Please advise your viewers that may be using the current 1.1 beta and/or final to NOT enable widescreen or disable widescreen if they are currently using it.”
The rest of the patch, which adds new features for single and multiplayer – including voice chat and four new maps – should be fine, but you may want to treat the widescreen features with special caution until id gets a proper fix.