All my messages get marked as read a lot, and I don't mark them all as read. Half the headlines were bolded in black, I go to the bathroom, come back and the threads are all marked as read, even though I didn't read most of them. What gives?
I don't know what the time limit is, but after awhile of inactivity, the threads that have new posts in them will be un-bolded like you've read them. I don't know why it does that, maybe the cookies expire. I'll direct this to the main chickie.