I've got a DSI XL (never been firmware updated), and a M3i Zero. It pretty much works great but every once in a while it just gives a black screen. After you start the DS and select the card (card always appears) the screen just goes black and nothing happens. If I take the memory card and reload the SYSTEM folder back onto it, it will work again untill the same thing happens. Here's the really strange thing. After this happens (black screen) if I take the M3i Zero and pop it into a regular DS (DS Lite) it will work just fine, and after doing so putting the card back into the DSI XL works again too. Anyone know what is happening here? Really annoying having to take the DS Lite everywhere you go just to ressurect the card for the other machine.