Yeah did you get it from the UK?
My card stopped working after a few weeks, was playing new super mario bros 2 one day, shut the lid, came back and it had frozen. So I rebooted and everytime I hit select to load a game it said read error. I have recieved my new card today but it took about 2 weeks to send it back and get a replacement, they're pretty slow at replying to emails, but I guess I got a working one in the end, hope it stays working!