Yeah-- I just typed out a rather long post here, and when I hit the Submit Post button, the forum software logged me out instead of submitting the post.
Luckily, I backed up and saved the text to the clipboard so I could re-post, but I had to log back in and enter the post again to make it work.
It only happened the once, so I'm not too concerned about it, but it might be worth investigating.
Happens to me each time I go offline and come back (while keeping the browser window open). Which I guess is the way it's supposed to work.
Might be the case here?
Might be. After an interupttiong the session information might expire. Try setting yourself to autologin and it should work from there.
Luckily, I backed up and saved the text to the clipboard so I could re-post, but I had to log back in and enter the post again to make it work.
It only happened the once, so I'm not too concerned about it, but it might be worth investigating.
Your link is broken.
... of course it is. 
Check the date of the original post. It was before the forums got rewrote.
...
Oh. I didn't catch that.
...
Oh. I didn't catch that.
NP.
I'll keep an eye on it - and let me know if it's a repeatable error. It almost sounds like the system lost track of your session information for a moment there.