This has happened the last several nites. Previously 'Back' took me back to the post I had prepared. No great harm as I then saved to wordpad and tried to post again, got same message, Refresh to blank message field and post went OK
Tonite When this appeared back got only a blank message field[>:][>:][>:]

This is new problem for me. I did check the browser settings ( Your instructs do not match IE 6.0.2)

this message appears if you take over 35 minutes to post. your session is timed out and needs to be reestablished.