It's not an issue at the moment (due to remember me?).
I had not clicked remember me at the time...I have since then selected this option.
I don't think "remember me" is necessarily the solution though. I just wanted to be able to reauthenticate after timing out. I seemingly had to close my browser sessions to force a "reboot" of my information.
I tried to edit one of my posts, and I got "a security token is missing message". I was still logged in as i had the "edit" button on my post....I logged out, killed all IE sessions, came back, re-logged in and was able to post.