We were informed of an issue that caused users who had logged out of the forums to be unable to log back in with the error message "Your session timed out while posting. Please go back and try again."
If this affected you, clear your browser cache, refresh the page and you should now be able to log in.
If you have any further issues, let me know. You can get a hold of me via the Chat link above. I'm not always immediately available so leave a message (or PM me) and I'll get back to you as soon as I'm able to.