From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5)
Gecko/20041220 Fedora/1.7.5-2.icc

Description of problem:
Mozilla package(s), when uninstalled in the course of an upgrade,
leave several empty directories remaining after un-installation. 
These are version-specific directories beneath the /usr/lib/,
usr/include/ and /usr/share/idl/ directories.

For example, I just updated to mozilla-1.7.5-1 (all packages for this
version: "rpm -U mozilla-1.7.5*"), after doing several prior updates.
 Now I see that the following directories exist on my system:

  /usr/share/idl/mozilla-1.6
  /usr/share/idl/mozilla-1.7
  /usr/share/idl/mozilla-1.7.2
  /usr/share/idl/mozilla-1.7.3
  /usr/share/idl/mozilla-1.7.5

All these directories are empty, with the exception of the last one
which is still in use.  The same set of empty directories can be found
beneath /usr/lib and /usr/include.

  

Version-Release number of selected component (if applicable):
mozilla-1.7.5-1

How reproducible:
Always

Steps to Reproduce:
1.Update existing mozilla packages to a new version
2.
3.
    

Actual Results:  The older version of Mozilla is uninstalled prior to
the installation of the new packages, but leaves unused directories
behind.

Expected Results:  All files and directories used the packages to be
uninstalled should be removed.

Additional info:

I stated above that this is seen on a Fedora Core #3 system, but the
problem is not an artifact of this distribution.  The same behavior is
seen with FC2 and with RHL v9.

Also, the empty directories are indeed orphans.  When queried, RedHat
Package Manager states that the empty directories are not owned by any
package.