qole, I don't think that is part of theming. I think that is part of hildonizing (even for Qt). For example the menu on top shouldn't be there, it should be accessible by the top left icon.

I found this blog post interesting: QGtkStyle now part of Qt. Lots of information there.

Google project page.

And the screenshots here are a great example of how Qt blends in well with the native OS toolkit.

If the fonts don't look well yet, reason could be related to this.