Problem with yum update && yum upgrade

[Roger]

Hi
I have been using sudo yum update && yum upgrade every couple of days or 
so to keep Fedora 16 up to date but this morning have a problem.
It installs some files DKMS uninstall completes yum then cleans up some 
files and verifies, removes unwanted kernel-devel

Skipped (dependency problems):
   system-config-date.noarch 0:1.10.5-1.fc16

Loaded plugins: langpacks, presto, refresh-packagekit
http://nodejs.tchol.org/stable/f16/x86_64/repodata/repomd.xml: [Errno 
14] curl#7 - "Couldn't connect"
Trying other mirror.
Resolving Dependencies
--> Running transaction check
---> Package system-config-date.noarch 0:1.9.67-1.fc16 will be updated
---> Package system-config-date.noarch 0:1.10.5-1.fc16 will be an update
--> Processing Dependency: python-slip >= 0.2.21 for package: 
system-config-date-1.10.5-1.fc16.noarch
--> Finished Dependency Resolution
Error: Package: system-config-date-1.10.5-1.fc16.noarch (updates-testing)
            Requires: python-slip >= 0.2.21
            Installed: python-slip-0.2.20-1.fc16.noarch (@updates)
                python-slip = 0.2.20-1.fc16
            Available: python-slip-0.2.17-1.fc16.noarch (fedora)
                python-slip = 0.2.17-1.fc16
  You could try using --skip-broken to work around the problem
  You could try running: rpm -Va --nofiles --nodigest

I ran sudo yum update --skip-broken && yum upgrade which installed and 
updated some files but fails to complete.
rpm -Va --nofiles --nodigest doesn't seem to do anything.

What should I do to resolve this impasse?
Roger