Minecraft suffered a teensy security breach over the weekend, leading Mojang to pull the servers offline temporarily. But now the game is back up, and lest any of its roughly gazillion users worry that their information was compromised, Mojang is assuring players they're safe.
A blog post (via IGN) claims that the security issues did not involve "any leak of passwords or personal information." Mojang's Lydia Winters also thanks the team for getting on the problem so fast and the fans for being patient while the servers were fixed.
The flaw was apparently in the authorization system, which allowed hackers to log in and use other peoples' characters. Whatever the exploit was, though, it didn't grant them access to your password, so you can sleep soundly.