On Sat, Oct 22, 2005 at 05:59:34PM -0400, iMac wrote:
> I also typed this command:
> cat /var/run/utmp
> 
> Response was:
> ttyE0root
> 
> Typing: cat /var/run/utmpx
> 
> Gave this response:
> utmpx-1.00
> roottyE0ttyE0K
> 
> Hmmm, bizarre.   The files don't appear to be empty.   Any other ideas?

Very strange indeed... I have no idea what would cause that :( It does
look like your utmp and utmpx files have the info on who's currently
logged in, so I don't know why users and who don't display that info,
but don't give any error message either.

Perhaps running:
ktruss users

might provide some clues...