The existing package (Ver. 1.0.1) is not compatible with the current version of Thunderbird (Ver. 3.1.1) which ships with Fedora13 and F14 Alpha. A new version is available which works with the current release. http://enigmail.mozdev.org/download/index.php
Nevermind, For some reason my email machine is telling me 1.0.1 is the current package. Yet my other machine reports 1.1.2 as the current package. Something is a miss on my end. Sorry for the noise.
closing problem solved on my end.