[Yum] Transaction Check Error: blah (which is newer than blah) is already istalled...

[Cormac J. Gebruers]

After months of trouble free use, I seem to have got locked into a cycle 
of instability with Yum since my first reported error a few weeks back. 
That issue was successfully resolved, but here's the latest installment...

Running Transaction Test
Finished Transaction Test
Transaction Check Error:   package glib2-2.4.8-1.fc2 (which is newer than 
glib2-2.4.0-1) is already installed
  file /usr/share/locale/am/LC_MESSAGES/glib20.mo conflicts between 
attempted installs of glib2-2.4.0-1 and glib2-2.6.0-1_10.rhfc2.at
  file /usr/share/locale/ar/LC_MESSAGES/glib20.mo conflicts between 
attempted installs of glib2-2.4.0-1 and glib2-2.6.0-1_10.rhfc2.at
and so on
and so on
and so on...


What to do?

Regards
Cormac