I've seen a report on Nintendo3DSblog.com that it could have something to do with people not having setup their wireless correctly and having the wireless switch on which means that the 3DS is always trying to get an internet connection going which could make them bug out. The same person also said that he had 2 customers with just the same problem on their DSi XL just a day ago and it turned out to be their WiFi.
Has anybody seen that happening when they had wireless off?
There were also some people on the NintendoLife forums who said that they started to get those problems after they've updated their 3DS to the new firmware, but those who haven't because of no internet connection are still fine.
( Edited 28.03.2011 10:31 by SirLink )