F10 Update errors

[vincent Onelli]

For a period of time now every time there is an automatic update it is
stopped because error, the following is the error info what I was able
to get.
Error Type: <type 'exceptions.IndexError'>
Error Value: list index out of range
  File : /usr/share/PackageKit/helpers/yum/yumBackend.py, line 2329, in
<module>
    main()
  File : /usr/share/PackageKit/helpers/yum/yumBackend.py, line 2326, in
main
    backend.dispatcher(sys.argv[1:])
  File : /usr/lib/python2.5/site-packages/packagekit/backend.py, line
606, in dispatcher
    self.dispatch_command(args[0], args[1:])
  File : /usr/lib/python2.5/site-packages/packagekit/backend.py, line
581, in dispatch_command
    self.update_packages(packages)
  File : /usr/share/PackageKit/helpers/yum/yumBackend.py, line 1446, in
update_packages
    txmbr = self.yumbase.update(po=pkg)
  File : /usr/lib/python2.5/site-packages/yum/__init__.py, line 2965, in
update
    updated_pkg =  self.rpmdb.searchPkgTuple(updated)[0].

For while I am using "yum clean metadata ; yum update"
some time even here I get some line with error
I am using HP zv6000 dual boot 1 Gb of memory, IDE hard disk 40 GB
partition 
if any body has the answer I will appreciate very much and thank you in
advance.  Vinny