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Description of problem:
When upgrading FC2 to FC2 (in attempt to fix some unrelated problems),
anaconda installed a bunch of compat* packages.  It happened because
anaconda treats versioned obsoletes as non-versioned ones.  For
example, compat-db obsoletes db4 older than version 4.2.  Anaconda
finds db4 installed and decides that compat-db obsoletes it.  
The version of db4 is not checked.

See also bug #123911.  While yum tries to support versioned obsoletes
but does it wrong, anaconda doesn't even try.  From file
findpackageset.py in anaconda sources:

# FIXME: I should really iterate over all matches and verify
# versioned obsoletes, but nothing in Red Hat Linux uses
# them, so I'll optimize

This statement is incorrect for Fedora Core 2.


Version-Release number of selected component (if applicable):
anaconda-10.0-5

How reproducible:
Didn't try

Steps to Reproduce:
1.Install FC2 from CD (Workstation, English, all default).
2.Upgrade that installation to FC2 using the same CD in the same
configuration.
    

Actual Results:  Several new packages are installed.  They all start
with "compat".  "compat-db" is one of them.

Expected Results:  No packages need to be installed.

Additional info: