I have a "Five most recent users" thing going on my homepage, here: http://teatimeshow.com ...which pulls the most recent five from last_activity in the xf_user table. However, it is as dynamic as I would expect, or it would appear it should be. As in, users will post, but it won't be reflected (yet?). If you look at the forums and look at the latest posts, it's not in the order it should be in the top five thing. So I thought, well maybe just them clicking around is (and should be) reflected in last activity, and that could explain it except - the order doesn't change. Things stay the same. Same top five in same order. However, they DO change after some time. So I'm asking I guess, is last_activity run on a cron, and does anyone know what actions will prompt a change in that field?