I can't imagine what I've done, but suddenly I find I can no longer
su from a regular account when I login over a telnet connection.
The account owner is listed in /etc/group under wheel, and up until
yesterday I could always su no problem.  Funny thing is, I can su from
the same account if I hook up a keyboard and display and access the
account from the console.  I can also login as root directly from the
console.  Any ideas much appreciated.

henry nelson