Hi all, I had the same problem, and the workaround proposed by Thomas Themel worked well.
About the upgrade of the network-menager-kde package: It is not possible to download it for the amd64 architecture using a pakage manager and the command dpkg -i network-manager-kde_0.9~svn1054632-1_amd64.deb leaves a broken package in the system. I notice that in the experimental repository only the i386 version of the package is shown with a green background. I don't know what's the meaning of the background colour and I can guess that red it's not a good thing. But what does it mean exactly? That the maintainers are aware of the fact that it does not install itself correctly? Sincerely, Anton