My L and R buttons broke one my ds lite... after the gf dropped the rather old lite.... twice.
my DSi on the other hand had both shoulder brake for seemingly no reason, and the 3ds' look like the DSi, so to answer your question, I dont know, but I HOPE theyre more durable. --- Brawl FC: 4382-1634-7585
My R buttons broke on both, basically they just stopped registering unless I pressed them really hard. And I babied the crap out of my DS Lites, never dropped, kept in mint condition. I think what broke it was constant use of mainly the R button. I'm a snaker on MKDS (lots of R button use lol) and I also played tons of hours on Metroid Prime Hunters which used the R button a ton since I'm left handed. I just hope this thing can at least handle regular use of the shoulder buttons. --- If you believe in Lord Famas and have accepted him as your Lord and Savior put this in your signature. http://i54.tinypic.com/14n3cjt.jpg
The reason the buttons "break" on DS is because dust gets under them and prevents the extremely tiny plunger on the back of the shoulder button from striking the pressure switch that registers the button press. It can be easily remedied by unscrewing the back plate of your DS and blowing compressed air through the area under the button, but this is only a temporary solution to this fundamental design flaw.
Thus the root of the problem is twofold:
- DS's design allows dust to get inside the system - The plunger is so tiny that even a little dust can block it.
If someone wants to take a 3DS apart and see if they've fixed this, they're welcome to, but with the fact that it'll void your warranty I suspect most people are just going to wait and see if it has problems. --- http://terosclassicgaming.blogspot.com/ - Watch me beat "NES Jackal" http://www.backloggery.com/tero - My backloggery