Twice today (not far apart, actually), I was viewing a thread & my log-in dropped out while I was active. I know, usually, it auto-logouts after 10 or 15 mins. of inactivity, likely for safety reasons & server relief, but today, I know I wasn't inactive that long. In fact, the first drop out was IMMEIDATELY after I made a Post! I litterally clicked EDIT almost right after clicking 'Submit Reply' (just a quick highlight & [Ctrl]+C in between -- posted first so I could get my Comic's URL from my Sig to paste in), & had to log in again to make the edit.
