First of all, this may be a problem with the card, But when I try to write to my SD card put in the built-in reader, I get a message saying the destination is read-only. I've checked the little switch on my card, and it should be writeable.
I've tried it on my desktop (Ubuntu 8.10 and Vista Ultimate). In Ubuntu, it'll try writing to the card, but just keep going and going, and never end. Pretty much the same with Vista (built-in reader on my desktop).
Am I safe to assume its my card's problem?