I'm suddenly having a similar problem, I installed 3.3 the other day and all of the sudden when I transfer music it's listed in the transferred window, the tracks are listed on the disc but when I play it, no sound. I reconnect to the PC and suddenly a blank disc. This even happened to a disc that was playing fine last week, I added some more tracks and now the entire disc is blank. I find it hard to believe it's the unit, It worked fine a few days ago and it still plays other discs fine. Any suggestions? Or has anyone had a similar problem with 3.3. Going to downgrade to 3.2 again and see if that helps (damn, 3.3 was so much faster!)