From the help forums, if you keep entering the site using the same cookie, some browsers especially on (AOL) can think you have been on the site forever. So, two possible fixes:
1. Log out and then log back in. One of the changes in the update file is a check for a VALID Session when posting and doing other things.
2. DELETE all your cookies. This process forces a new login, therefore forcing a new cookie and therefore setting new session data.
Let me know how you make out, either here, or e-mail me at home. T