Crackers
greasy ginfers
Doing it to me too. I'm coming back to the site after a few days off it(work computer and all that), and I'm logged off completely, despite selecting to stay logged in. Happened twice on my home pc too.
Three times today, I've logged in and tried to make a post, only to be told that I'm not logged in.
I reboot my browser and can stay logged in for 1 post, then the caf tells me I'm not logged in again and won't recognise my subsequent log-in attempts.