Description of problem:
It crashes(?) frequently, showing a window with:

Traceback (most recent call last):
  File "/usr/share/PackageKit/helpers/yum/yumBackend.py", line 2149, in get_distro_upgrades
    present_version = int(self.yumbase.conf.yumvar['releasever'])
ValueError: invalid literal for int() with base 10: '11.90'

Version-Release number of selected component (if applicable):
PackageKit-yum-0.4.9-0.2.20090616git.fc12.x86_64

How reproducible:
Often

Steps to Reproduce:
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Actual results:


Expected results:


Additional info: