I've had the exact same problem with my 350d and Lexar 2 GB card. It's happened twice in about 3 months. That's not going to cut it, I can't be worrying about it when I'm on a trip.
Both times, I've tried to reformat the card but it just hangs on the format. Then, you can't turn the camera off. I had to take the battery out and things worked fine (albeit with a now empty card).
I'm going to send mine back to Lexar and buy one or two smaller Sandisks as backups. It's very disappointing, I thought I was getting the best card on the market.
Both times, I've tried to reformat the card but it just hangs on the format. Then, you can't turn the camera off. I had to take the battery out and things worked fine (albeit with a now empty card).
I'm going to send mine back to Lexar and buy one or two smaller Sandisks as backups. It's very disappointing, I thought I was getting the best card on the market.