I've been logged out 3 times within 5 minutes tonight. It has rarely happened before, and never with my current browser version and settings until tonight. Since WGT has done their "maintenance" today, I almost never had this problem. Now, WGT refuses to keep my credentials, even though I have it set so it shouldn't lose them. Ever. period.
It appears to be an issue since the WGT maintenance. I'm not sure.