My practise, is that I regularly run rpm -Va to verify and list out broken or changed files. Then I would reinstall any rpm which I think have broken files. Now that I'm working, and being on rawhide, its rather tedious and time consuming to do this regularly. So I just wrote a python script for helping out with the extracting changed files list and querying which rpm the file belongs to.
Those who interested to use it, you can grab it here: find_changed_rpms.py
Usage: ./find_changed_rpms.py [OPTIONS]
This script will automatically find for packages which
one or more of its files does not match the information
stored in the RPMdb.
-h : show this menu
-v : be verbose
This script excludes packages which only have its config files
changed and packages which its files only does not match the
NOTE: Its not bugproof!.
If anybody out there have some cool hacks related to Fedora. How about start sharing them now and help Greg build his Fedora weekend hacks catalog.