Short tip: Red Hat Enterprise Desktop and Flash plugin updates
If you want to always use the most recent Flash version around with Red Hat Enterprise Desktop (RHED) you'll probably use the Adobe YUM repository. If you're also receiving packages from the RHN channel "RHEL x86_64 Workstation Supplementary" further complications are possible because this channel also offers a package with the same name.
If both channels are used it is possible that an update for Flash is installed from the Adobe YUM repository and overwritten the next day by the RHN-Channel.
To fix this issue it is sufficient to alter the YUM/RHN configuration file /etc/yum/pluginconf.d/rhnplugin.conf
to exclude the package. After that updates for this package are only received using the Adobe YUM repository:
1# vi /etc/yum/pluginconf.d/rhnplugin.conf
2...
3[rhel-x86_64-workstation-supplementary-6]
4enabled=1
5exclude=flash-plugin