Update (5/6/13) : fixed after they sent me a replacement! i have a 3ds xl with the latest firmware. I bought a DSTwo with 4GB card from http://nds-card.com and it came today and was expecting it to work out the box. First time i tried it didnt work and got the "An error has occured" screen. tried it a couple more times with the same error, then I ejected and reinserted the sd card and this time it did work. rebooted it and got to the "error" screen. tried removing and reinserting the flashcart a few times but still got the error. What i then noticed was that to get it to work i have to eject and reinsert the sd card. Just removing and reinserting the DSTwo cart is not enough. ejecting and resinserting the sd card seems to work about 80% of the time. Another thing i noticed is that if i place the 3ds xl on a hard kitchen table to restrict the movement and i get the flashcart to boot up. If i press the "Home" button to exit out the cart and try to launch it again it fails to load. This seems to suggest its not a contact / connection problem. I then tried the flashcart in an old DSi and it works first time everytime. Quite disappointing as the DSTwo has some good features. Would nds-card accept it back and maybe swap for a R4i GOLD 3DS Revolution for Nintendo 3DS? Is there any issues with this card in a 3DS XL? I want a good flashcart that my young son can use without the hassles of not working and having to eject / reinsert sd cards all the time. i have an AceKard 2i in my Dsi and thats been trouble free since i got it.