At first I though I might have imagined it but It happened several times now, I usually click the Unread Content link and start reading threads, then click the browser back button to go back to the unread list, the last thread clicked won't be on the list no more, this is good, now I usually leave threads I believe will take more time to read/reply for the end and the problem is that sometimes, one of these threads will disappear from the unread list without me reading it, this has happened at least 5 or 6 times and makes me wonder if other threads are masked ar read without me noticing, I know this is probably hard to diagnose but I'm sure there's a problem, I'm not crazy