Sounds very weird to me that it would only happen on boxes where ubuntu-desktop has been installed afterwards. It doesn't look like it's related to PolicyKit at all, but to the theme engine.
Could you try to reproduce the bug when the theme Clearlooks?
Sounds very weird to me that it would only happen on boxes where ubuntu-desktop has been installed afterwards. It doesn't look like it's related to PolicyKit at all, but to the theme engine.
Could you try to reproduce the bug when the theme Clearlooks?