When dist-upgrading Ubuntu 11.10 to 12.04 UpdateManager asked to enter a "new" user password for MySQL. I denied 3 times. This asking was put misleadingly. I better should have entered a user password ...
When I had 11.04, there was an option "ask for password", something like this. I checked it out, and instead of password field I got "login" button. Now, when I got 11.10, I doesn't see that option. ...