According to reports, 50 million NXT has been stolen from the cryptocurrency exchange Bter:
http://cointelegraph.com/news/112278/breaking-bter-hacked-50m-nxt-stolen https://nxtforum.org/news-and-announcements/forgers-have-been-faced-with-a-choice
Worth noting here that this wasn't an attack on NXT itself, but apparently happened thanks to a security issue with Bter's servers.





