I found that installing the 1.01 patch and then the 1.02 patch works fine.. Don't know if installing ArmA, to a diffrent hdd has anything to do with the files not being able to be verified, from 1.00 to 1.02..
i have the german dvd version (SE - but i don't think that matters). i already tried installing patch 1.01 first - still errors. i uninstalled winrar and the patch went pretty far. it still had some problems with weapons.pbo later in the installation process (while having winrar installed the errors appeared very early and stated either buildings.pbo, characters.pbo or both where corrupt).
my installatation of arma is not in the standard directory (i dont want to have a "program files" just for arma while this directory on german windows is named "programme")...
i also don't want to install it on another hdd - i have a pretty fast sata II drive and my other hdd is old and slow.
based on what you said i did a chkdsk on my drive - we'll see if it helps.
EDIT: nope - it didn't help. still getting errors. now also on wheels.pbo.... any official word on what is going on here (in the german forums there are also people who have the same problem)?