ARMA II has finally been patched to version 1.3, bringing with it a ton of fixes. Unfortunately, if you own the Steam version of the game, prepare for a real groaner. It seems the patch for the store-bought version of ARMA II is only 150-megs or so, but if you patch the Steam version, you need to download a whopping 4.5-gigs of data.
Bohemia Interactive says don't blame them.