[Yum] FC6: can't install anything with yum

[Kevin Layer]

I mirror the FC6 repos from kernel.org.  I successfully upgraded a
machine running FC5 to FC6 with it.  I can install packages on that
system with yum fine.

I installed a fresh copy of FC6 on another machine.  After the
installed, this is the first thing I did:

[root at relay cache]# yum install emacs
Loading "installonlyn" plugin
Setting up Install Process
Setting up repositories
core                      100% |=========================| 1.3 kB    00:00     
Reading repository metadata in from local files
primary.xml.gz            100% |=========================| 772 kB    00:00     
################################################## 2242/2242
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for emacs to pack into transaction set.
media://1161131669.029329%233/Fedora/RPMS/emacs-21.4-17.i386.rpm: [Errno 4] IOError: <urlopen error unknown url type: media>
Trying other mirror.
Error: failed to retrieve Fedora/RPMS/emacs-21.4-17.i386.rpm from core
error was [Errno 4] IOError: <urlopen error unknown url type: media>
[root at relay cache]# 


Poking around a little more, I added a `print' statement below to
/usr/lib/python2.4/site-packages/yum/sqlitesack.py:

class YumAvailablePackageSqlite(YumAvailablePackage):
...        
    def returnSimple(self, varname):
...
            c.execute(query)
            r = c.fetchone()
            self.simple[varname] = r[0]
            if varname == 'basepath':
                print "db query for %s returned %s\n" % (varname, r[0])

it prints this:

[root at relay ~]# yum install amanda
Loading "installonlyn" plugin
Setting up Install Process
Setting up repositories
Reading repository metadata in from local files
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for amanda to pack into transaction set.
db query for basepath returned media://1161131669.029329#4

media://1161131669.029329%234/Fedora/RPMS/amanda-2.5.0p2-4.i386.rpm: [Errno 4] IOError: <urlopen error unknown url type: media>
Trying other mirror.
Error: failed to retrieve Fedora/RPMS/amanda-2.5.0p2-4.i386.rpm from core
error was [Errno 4] IOError: <urlopen error unknown url type: media>
[root at relay ~]# 


So, in the bad case, it's getting the media://... out of the database.

How do I verify that the sqlite database is OK?  Can it be rebuilt?

I've done "yum clean all" and uninstalled yum (actually, anything with
yum in the name) and reinstalled (with rpm).  Same deal.

The thought of going back to just rpm is a deal killer for me.

Thanks.

Kevin