Firerfox won't uninstall

Yast (and Smart) are having difficulties removing an older version of 
Firefox when I try to update it. I am left with two entries on yast for 
Firefox, but the older version doesn't really exist (anymore). RPM says 
that the older version is not installed, and rebuilding the DB didn't 
help. This happened when updating from 2.0.0.12-5.1 to 2.0.0.13-1.1. I 
can't seem to find the older verion anymore, in hopes of downgrading 
then uninstalling. How can I get rid of the duplicate entry?

Here is the error message:

---
No directories in update-desktop-database search path could be processed 
and updated.
error: %postun(MozillaFirefox-2.0.0.12-5.1.x86_64) scriptlet failed, 
exit status 1

2008-04-03 00:13:13 MozillaFirefox-translations-2.0.0.13-1.1.x86_64.rpm 
installed ok
2008-04-03 00:15:44 MozillaFirefox-2.0.0.12-5.1.x86_64 remove failed
rpm output:
Usage: usr/bin/update-mime-database [-hvV] MIME-DIR
No directories in update-desktop-database search path could be processed 
and updated.
error: %postun(MozillaFirefox-2.0.0.12-5.1.x86_64) scriptlet failed,