Comment 3 for bug 554193

But as far as I see, generic qt4 applications already use gtk+ by default (i.e. unetbootin, skype, mathematica, google earth - although sometimes one has to tweak these applications to use up-to-date system qt libraries for styling to work, but this is not something the distribution can control). What concerns KDE applications on the other hand is that they only look at the kde settings in .kde for information on how they should display, and I guess it would be quite a pain to make every KDE application fallback to the default qt options if they somehow figure out they do not run under a KDE desktop. So as far as I understand the mechanism for applications built for the K desktop the way to go would be to adapt the config files.