Having the same proplem here catthepatch. I posted it in the shoutbox but no one could confirm it. Glad to see I'm not the only one having this problem.
Just as a test, I went and switched back and forth through around 15 or twenty different forums and posts to see if I could get this to happen and I did not get asked to login again, at any point. Just one question.....when you initially login do you check the "remember me" box?
Not sure but I just encountered the "Database error" to which you are referring, about 2 minutes ago. Maybe have to wait for Viper so see if he knows what is going on.