Hm, I'm somehow 'offline', so is Sky who just logged on.
We both are recorded as 'active' users, though. And at least for me, "show on active...:Yes" is checked. I did not find another extra check-box for "show offline/online" (?) so I assumed the aforementioned option enables/disables is supposed to affect both features(?).
Anyways, another minor thing:
If I don't log on automatically, I#m listed twice (under registered users and guests) in the active users list once I log on. Seems not to be an update problem, I was counted 'twice' for 30 minutes or so.
edit: it's gone now, maybe it was indeed an update problem (an action like posting is needed to get it updated?)