My Canon G3 all of a sudden is puking when it tries to read my 256 meg CF card. It reads my wussy 32 megger no problem, so it's definitely the card. I do have a USB Media Reader drive thing for my PC ...
Apart from, you know, losing data. =P I shoot with a huge stack of 8GB Sandisk CF cards and I'd love to weed out the ones that are nearing their usable lifetime. I have some older 4GB cards the give ...