Thanks for posting this message. I started seeing the exact issues you describe. I'm a hardware / software kinda guy so automatically assumed it was probably a hard drive problem but then saw your post and another web site showing the recent software upgrade and the light bulb went on. In a way, I'm kind of glad it's a software bug because that means my 522's hard drive isn't failing. Hopefully a future software upgrade will correct the problems. Does anyone know any tricks on how to communicate between a PC and the 522 via it's USB port? I aslo noticed a "H/W Tests" button in the diagnostics menu but it's unselectable. Does anyone know how to access that button?