These are the full patch notes as seen in the readme file with the patch. There is still no date set for the release of the patch, but we want to keep you up to date.
* Windows Vista: Mouse cursor should no longer have an offset in the menu.
* Windows Vista: Unrequested launches in windowed mode should occur less often now.
* Timedemo can now be started from the command line.
* Better dynamic texture support for enthusiast mode.
* Added 64-bit executables for Windows XP x64 and Windows Vista 64-bit version. In Windows XP x64 a new shortcut will be placed under the Crysis Warhead program group. In Windows Vista right-click the Crysis Warhead icon in Game Explorer and choose to run the game in 64-bit mode.
* Games saved in 32-bit won't work properly when running the 64-bit version and vice-versa.
Note: After applying the patch the version displayed (lower right corner of menu) is 188.8.131.520.