should i expect "yum update" to work on a fresh fc4t2 install?

[Robert P. J. Day]

  lately, i've had zero luck getting "yum update" to work on a
freshly-installed fc4t2 system.  it worked fine back on monday evening
on the first system i installed, but more recently, every attempt to
update a new system has failed.

  as i posted previously, one of the dependency problems was for
"libpq.so.3".  so, just to make sure i'm not doing something subtlely
wrong, what is the simplest recipe for updating a new install?

  as a test, i'm just completing an install, at which point i plan on
turning off gpgcheck in the yum files (this is just a test), and then
simply running "yum update" with the yum config files that are there,
with no modification whatsoever.

  theoretically, should this work?

rday