Okay, so, I got a DS Lite like 2 weeks ago as an early christmas present. Before I got my AceKard I played around with PictoChat a bit. Once I pressed the "right" D-pad button - and the DS shut down. I ignored this. When I got the AceKard I tried playing Mario Kart. Same thing happened in the game menu. But I ignored it as well. Then I began playing Kingdom Hearts. I can play but well... sometimes the DS will just turn off. It seems to occur completly at random, except it only happens when pressing diagonals with D-pad (up-right and right-down to be precise), and after some time of playing (10-30 mins usually). Same thing when playing with Jam Sessions. But touchscreen-only games play just fine. Now I can't ignore that, it's annoying >_> So I'll most likely send it back where I got it so it'll get fixed/replaced under the warranty. I'm just interested, though, if anyone had similar problem.