Description of problem:
When I update my system with KPackageKit, it shows me the list of updates with everything checked, I click on "Apply" and nothing happens. (Well, a progress dialog pops up and vanishes instantly.) I refreshed the list of updates and clicked "Apply" again and then it worked.

Version-Release number of selected component (if applicable):
zif-0.2.4-0.78.20110918git.fc15.x86_64
PackageKit-zif-0.6.17-1.fc15.libzif.so.3.x86_64
kpackagekit-0.6.3.3-2.fc15.plasma.x86_64
(The KPackageKit build is the same as the official kpackagekit-0.6.3.3-2.fc15 except that I backported my Plasma services patch.)

How reproducible:
Always? (Seems to have happened both times there were updates available so far.)

Steps to Reproduce:
1. Update your system using KPackageKit.
  
Actual results:
Works only the second time.

Expected results:
Works the first time.