My L button is always active. No liquid was spilled over it , it didn't fall down and I didn't press the button too hard. I also never opened it or modified it in any way. Plus, there are no visible signs of any problems, the button is not sticky or anything. There where never any problems with the button before. If anything, the feedback from it seems a little weaker than the feedback from the R button, but I think it was like that from the beginning. I also still have warranty. I was playing Luigi's Mansion when suddenly the button wouldn't go off again and it just stayed that way since then. So... that seems like somewhat of a common issue, the Nintendo Tech forums (and other places) are full of people with the same or similar problems. One guy there writes: Software problem? :/ If there's really a possibility that it could be a software problem, I could just update to 9.2.0 and see if it does anything, but I'm doubting the use of that now. Anyways, you might suggest now that I just send it in to Nintendo for repair. But that's a N3DS on 9.0.0, and I don't want some idiot at Nintendo to update it or even worse, replace it with a new one > FW 9.2.0. Add to that that having to uninstall all my legit CIAs and somehow backing up the saves will be bloody annoying as well. Sooo... any ideas?