It turned out that there was a bug in the way the cache-manager dealt
with caching stat information in ultrix. If you are authenticated but
your access to a particular directory is the same as system:anyuser's,
it wasn't caching the access info for that directory. Thus if you
stat() a long pathname for which your access is the same as system:anyuser's
for most of the directories along it, the cache-manager would do many
RPC's for just a single stat() when it should have had everything cached.
This bug is fixed in afs 3.4. I am told that there are other fixes
in 3.4 that will make ultrix performance even better.
-Chuck