just logged my 2nd char when the crates to access our sniper rifle and first kit were not accessible. i'm pretty sure i wasn't alone as there was a pretty large group there jumping around and looking otherwise annoyed. the crates weren't flashing, and standing next to them (or on top of them) brought up no dialog box. tried to hit F a few times just to be sure, but with no results.
edit: sorry, may have jumped the gun on posting this one, as it was working again after a relog.