Two things. First if you started the game and used a patch converter that's probably a reason why this happens.
Second, if you stole from them from a container (desk, locker whatnot) and didn't really get seen, sometimes they see you but don't give you a warning. Even though you get no warnings the game still does it internally. So you can end up with hostile people even though you don't know about it.
Other then that, I wouldn't know, so if you didn't use a converter nor steal anything and you're sure you patched properly, there might still be some bugs. You're not the first to report this on 1.02 though with the other accounts I've seen the users weren't reliable sources to really say that there's still a bug.