The first time I tried to install something via Apper/packagekit/zypper, I got list of "required" packages which were obviously unrelated to the one I wanted to pull. I tried issuing installation of different applications (Kaffeine, KSystemLog, Kate), and in all cases the same list of (unneeded) additional packages appeared:
Moreover, I tried to first install Kaffeine via YaST (BTW, no additional packages were required) and then remove it with Apper. To my surpise, during removal I got gstreamer-0_10-fluendo-mp3 license agreement requesting confirmation!
Although this list does not show up when updating, I instead get "The package that is being modified was not found..." error with no details and no visible consequences (all packages successfully installed according to the zypper's log). Not sure whether it is the same or separate issue.
I first filed bug report on Apper but was eventually referred here.
I have the same problem as Aleksey. I thought it was an issue with Apper, as only Apper seems to do it for me. Zypper seems unaffected, as does YaST for me. In my case, it wanted to pull down a different set of unnecessary packages (including everything matching the pattern xorg-x11-driver-*, e.g. every video driver for every card in existence). I've added locks on all the ones it wants, though marking packages as taboo in YaST did nothing to dissuade packagekit.
I'm using OpenSUSE 12.2 x64 with KDE 4.9.1.
We moved the upstream bugtracker to GitHub a long time ago. If this issue still affects you please re-create the issue here: https://github.com/hughsie/PackageKit/issues
Sorry for the impersonal message, and fingers crossed your issue no longer happens. Thanks.