yum / createrepo version for CentOS 5 builder

[Jonathan Dieter]

Is there a specific yum or createrepo version I need to install on a
CentOS 5.5 server so it can build packages for a child repository whose
parent is Fedora 13?

mergerepos is exiting with an error:
Traceback (most recent call last):
  File "/usr/libexec/kojid/mergerepos", line 229, in ?
    main(sys.argv[1:])
  File "/usr/libexec/kojid/mergerepos", line 224, in main
    merge.write_metadata()
  File "/usr/libexec/kojid/mergerepos", line 205, in write_metadata
    mdgen.doRepoMetadata()
  File "/usr/lib/python2.4/site-packages/createrepo/__init__.py", line
789, in doRepoMetadata
    rp.getPrimary(complete_path, csum)
  File "/usr/lib64/python2.4/site-packages/sqlitecachec.py", line 42, in
getPrimary
    self.repoid))
TypeError: Parsing primary.xml error: attributes construct error

I'm assuming this is because of the new sha256 checksums introduced a
release or two back.

Jonathan