Just tries to log out of the forums to see what you can see when you're not logged in and even though it said "all cookies cleared" etc. it didn't clear the cookies.
Might just be a firefox thing but I think its a bit of a worry... what if this was a public computer?
Also the first time I went to post that message it said "the message is to short"... I just clicked back and then submit again and it posted it... weird!
I'm not sure as to why it doesn't do it the first time, but the trick is to keep logging out until it actually does log out.
don't know why this is, & its a royal PITA.
If you manually clear the cookies from your machine, it takes less times to do it.
I had to keep doing this all the time as I recently spent time at another person's place who is also a member of this forum & didn't want to leave the risk of anyone else posting under my extra moderating status.