wildcard certificate questions

[lorenw at email.unc.edu]

I am researching certificate options as one of our current
certs will be expiring soon.  One option under consideration
is to purchase a wildcard certificate to cover our current
systems and any future ones as well.  My questions are:

1.  Has anyone had any experience with wildcard certificates
    or had any problems with them?
2.  The certificate vendors all claim that most any browser
    will work fine with a wildcard cert.  Has anyone run into
    browsers that won't work with them?

Thanks in advance,
Loren

J. Loren Watterson
Systems Programmer/Administrator
Carolina Population Center
UNC-Chapel Hill
loren_watterson at unc.edu
+1 919 966 1719