Comment # 9 on bug 910920 from Raymond Wooninck

The KDE Systray utility Apper is nothing more than just a frontend for
PackageKit. So Apper can not be the faulty party here as that is just
represents whatever PackageKit comes up with.  

However it can be easily tested by removing Apper. This is not an essential
part of the KDE Desktop. 

@Episteme, could you remove the apper package and see if you still have the
issue in a coupld of days.

We have to keep in mind though that once Apper is removed, most likely
PackageKit will not be started anymore either. However if the issue is no
longer there, then it must be PackageKit that does something wrong