The bosses say... We ran a security update on the boards software and server on Monday 19th Aug.

As a result you may notice that several features are not working as expected (remembering viewed threads etc). Try logging out and back in again, or clearing your browser cache if that doesn’t resolve it.

Now, although I have the remember me set to ON, every time I shut my laptop down, upon starting it again, I always have to log back in. That's been the case for a couple of months now. So much the log out, log in, suggestion.