"Name or password is invalid"

[jamesishere]

This has just started. I have two accounts, and whenever I try to login it says "Name or password is invalid", even though I am 100% sure my password is correct. Guest works fine, but all usernames do not.

[matlu]

Uh, yes, something's very wrong, even my account doesn't work. Hm   
Probably database server crashed, I'll have a look...

[matlu]

So, it works again.

For some unknows reason connection to database failed.

I use mySql database server, with java-mysql-connector. I heard some rumours that it has bugs, but I was not taking it seriously. Hm. I'll search the web