An additional input in this case: I too face the logout problem. Interestingly, if I am trying to reply to a thread, then though the URL shows the thread correctly after re-logging in, I get the message saying that the thread I'm posting to isn't valid or somethin like that.
- LF
Workaround: after re-logging in, use the back button to go to the screen where I have typed my message and submit the message from there. Since you have logged in again, this would be successfully posted and you will be saved the bother of typing the whoe post again.