I've re-downloaded the updated patch (I assume this and the "hotfix" are the same - if not, clearer directions are in order), and am still seeing the vehicle problem.
With a saved game, I can no longer move vehicles . . . which pretty much makes the game unplayable.
FYI: I'm running CMBN v1.01 (I had updated with an earlier patch - but did reupdate this morning), on a MacBook Pro (Intel), running OS X 10.6.8 (not the new Lion).