I'm an utter nincompoop...

I've just spent the last few days going into the forum, thinking "Oh, how odd- no new posts, again", and thinking no more of it. Only now has it dawned on me that you get logged out every so often, and that the new posts just weren't just showing up as "new" for me. Duh!

Please tell me I'm not the only person stupid enough to have done this...!

I had the same symptom - here and on other forums as well (more often).
I cannot give you any hint on how to get rid of this. Sorry