who shows "phantom" users

["Thomas R. Shemanske" <trs@hecke.dartmouth.edu>]

Recently I have noticed (legitimate) users logged in on one of our
servers with no processes running.

I know for a fact that they log into the server via (open)ssh, and
eventually close the ssh connection.

Nonetheless, who still shows them as still logged on (as does last). 
On the other hand, w does not show them as logged on.

Is there a way to get /var/log/wtmp to update itself?  Any ideas what
the cause of this might be? (ssh shutting down impoperly?)

It's not a huge problem, but an annoyance.

Thanks for any input


-- 
Thomas R. Shemanske                
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