Today an update is available for Fallout 3 for Xbox 360, PS3, and PC. The update is available for the English, French, German, Italian, and Spanish versions. It will be up today in all territories via Xbox Live and PlayStation Network and the PC patch can be found on the official Web site (http://fallout.bethsoft.com/eng/downloads/patches.html), and will also be up on Games for Windows Live as well.
A full list of the issues the update fixes is below, or you can point folks to: http://fallout.bethsoft.com/eng/downloads/patches-v1.1patchnotes-US.html
In addition, this update will be required to play the downloadable content coming to Xbox 360 and Games for Windows. The first DLC for Fallout 3, Operation: Anchorage, is scheduled to be released Tuesday, January 27 via Xbox Live and Games for Windows Live for 800 points.