Running the Update Software utility from Fedora Core 14 was giving me some conflicts and error messages related to Sane Backends which has to do with scanning, digital cameras etc.
This looks to be Red Hat Bugzilla - 749083. The error messages look like
"Transaction error: could not add package update for
The fix is easy
sudo yum update --obsoletes
The explanation (from Bugzilla) is that "The problem was that sane-backends-libs-gphoto2 has been obsoleted by the new package sane-backends-drivers-cameras, but it looks like Software Update didn't deal with this."
Thanks to John's blog for this