Yesterday I posted a question about libreoffice not showing the correct theme in Xubuntu 11.10. That question was quickly answered and by installing libreoffice-gtk it now looks really nice and in line with my global theme (Ambiance for Xubuntu, found here).
However, I have now noticed that various other programmes are also affected. E.g. the Ubuntu Software centre, Evince, Startup Disk Creator and the Update Manager.
Is there a global solution to have these apps and programmes to show the correct theme as well (and not the ugly Windows 98 look they have now?)
I already tried the solution offered here (installing qt-qtconfig) and here (making script for qt programmes), but both do not work. I guess they are not qt programmes? I also installed Evince-gtk, but that didn help either (for Evince).