As promised, the first Crysis Warhead patch has been released:
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.
# 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.