From Ars Technica:

LastPass officials warned Monday that attackers have compromised servers that run the company’s password management service and made off with cryptographically protected passwords and other sensitive user data. It was the second breach notification regarding the service in the past four years.

In an e-mail to reporters, Ars resident password expert Jeremi Gosney said the real-world risks the breach posed to end users was minimal. He based his assessment on the LastPass response to the breach and the system that was in place when it happened. He paid particular attention to the 100,000-round hashing routine, which he said was among the strongest he has ever seen.