Fedora 19. Update manager just sits there with a blank terminal screen
About three weeks ago, I believe that there was an update to some files which I think may have affected yum and or update manager. When I click on the update manager icon, I get a blank screen and nothing happens after that. I know that there updates available as I download and install them using Webmin. This situation exists on my Fedora 19 desktop and my Fedora 19 laptop as well.
Is anyone else experiencing this, and is there a way to resolve it ?