I have bought 2, 512mb XD Picture cards(Fuji) and both of these are coming up with "CARD ERROR" when inserted into the camera. The camera in question is an S7000 Fuji. I have tryed formatting the card numerous times but nothing other than "CARD ERROR" . I have spoken to techincal support at Fuji and they do not know of a compatabilty problem with the 512mb cards and said it could be a faulty batch of cards. I have two other XD cards of my own a 16MB and a 256mb and both work fine. I bought these 512mb cards as I am off to Florida soon. Does anybody have any idea or heard of other people having problems??