Yeah, I've been having some issues with login as well.. But in reverse. I was logged in last night and tried to log off, clicked log off, cleared cookies and temp files, closed IE then reopened and I was still logged in... Wierd..
FR - Yeah, I've started checking the "Remember Me" box. No real change in getting bounced. Although with that box checked, I sometimes get the same thing WN gets. Which is cool if I'm only gone for a little bit - prevents having to log in all over again, but could be annoying if I stay logged in all the time.