The clock system that keeps track of when you latest logged on seems to be in trouble with some members. As I'm writing this, it's 05.41 PM CET, but the info top right on the page says "you last visited 4 hours ago at 04.02 AM"; now those data are always presented in the time-zone you've chosen, mostly your own local time. Also, when I checked the user profile of a friend here, it turned out that the "latest activity" had not changed since last night (in both of these glitches, it stays the same even if I refresh the page)

So it seems at least some people's log data and time are not being updated. Maybe this is just an after-effect of a few long breaks in the last 15 hours, but logging is pretty vital so I hope it gets looked into.