Got it figured out:
You have to login as a different user, 'su' as the affected account/user, 'cd' to that user's home directory and remove the following hidden directories:
After you have removed these hidden directories, logout and login as the affected account. The desktop/gnome/metacity processes will rebuild the hidden directories and plugin default settings. Of course, you will need to recustomize your desktop afterward - like reload the theme, background image, desktop icons, etc.
Hopefully this info will save someone else some hair pulling aggravation when "yum" hiccups!