rwho has an issue with reporting the number of users on a system 
acurately.. basically, once you have 41 or more users on a system,
rwho will report no more.  Is there a hack around this?  I almost
always have more than 41 people on my machines and I would like to
see rwho get 'fixed' .. I've submitted a pr on formating (when a
machine has been up over 100 days, ruptime -a needed frobbing) that
was an easy enough fix, but increasing the number of users it will
report requires more work.

Does this have to do with the number of 'ttys' rwho knows about rather
than just MAXUSERS = 42 ?