You can adjust the time to stay active up to 24 hours. On the portal click on the Tools main menu selection, then select Session Timeout.
I second the above -- lose this "your session has timed out nonsense". For those of us who don't have a security concern, the "keep me logged in" should ACTUALLY keep me logged in... until I log out!! It's freakin' annoying.
Mine doesn't have that option - all I know is it has timed me out 5 times today already and it is truly annoying..
Mine logs me out at times way earlier than the 24 hours I have it set for. It allows logging back in with a couple of clicks to the Google option (no password entry required) but the non-working timing feature is annoying as well.