Those of you who own a BlackBerry Curve 8520 and can’t wait for an official release of its next OS update might want to check out the OS 5.0.0.610 leak. This is worth looking into if you are running on a 8520 with anything less than what is on offer. Needless to say, always tread on the side of caution by making a backup of all your important data, since this is not an official OS so there is no guarantee that everything will run smoothly without a hitch. Heck, even official OS releases also do run up against the wall from time to time.