Patch Notes
These are the full patch notes as seen in the readme file with the patch.

General Fixes/tweaks

* 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.

New Features

* 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.

Known Issues

* 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 1.1.1.710.