According to the DSTT website there's fake cards going about. Quite a few people who have ordered from DX have received the said "fake" cards so be wary if you've ordered from there lately.
The cards do actually work but according to the DSTT website, it may cause the cards, Micro SD card or the DS to burn out. It's worth pointing out that the "fake" cards work just the same as the real ones though...so they're probably just trying to stop people buying the clones.
But according to DX they are saying the factory who supplied them the DSTT split into 2, and one of them are producing the cards with the gold dot to distinguish them from the original cards at the other factory.
Here's a picture from GBA Temp.
Fake on the right (Gold dot where you put the micro SD card. The Letters "J2" above the 3rd contact)
http://gbatemp.net/index.php?showtopic=101132&st=0
Social Networking Bookmarks