I've got 4 1gb cards (2 Lexar 80x and 2 SanDisk Ultra II) and recently lost 2 images taken on a Lexar card with my 20D. I know Lexar recalled a bunch of cards and one of mine was affected. It was replaced, but the lost shots were on the other unaffected card. I've had it a while and never had any problems until the other day. My SanDisk cards have always been problem free. My 20D was unable to format the card and I received 2 different error messages. - Err99 and err02 Err02 is a CF problem. Err99 is a problem not specified in the manual. It lists non-Canon lenses as a possible reason but I only have Canon lenses so the lens was not the problem. I've emailed Lexar to see if the card is convered under a lifetime warranty but have yet to receive a reply. What type of memory cards do you guys use and what would you recommend? I know that the Canon does not support Write Acceleration so I know that a super fast card is not entirely necessary but by the same token I don't want to end up with a card that slows down my shooting. The above is all assuming that Lexar say the card has no lifetime warranty and I have to replace it, but would appreciate all comments and any poniters regarding speeds of cards that won't be a bottleneck. This is aimed mainly at Canon 20D users but welcome all input and comments.