i have seen that earlier (several weeks ago, but im sure it wasnt like that some months ago..) but was too lazy to ask about it here.
but if you compare the
Last Seen time shown in your friendlist, and compare the
Last Seen of your friend by visiting
the profile, the time is different.
maybe that occured when jsp automated the timezones of all users? there was a topic a month ago or two when
someone came up with the idea of automating users timezones by their location (or something like that),
which got introduced some time after. im not sure but i think this problem has something to do with that,
because it doesnt persist that long... and both seem kinda related with each other but dunno.
example (only showing a difference of almost a minute but sometimes it can be different up to 10 min, anyway the difference is clear):