Your Qt seems to have the wrong style. I think the cure could be re-installing some qt packages, don't know which ones though. My Qt applications look also like that when I run them from terminal with user root.
im not using the experimental version, im using the 4.6 i got from extras-devel
4.6 packages are still there? I'm wondering what for. Anyway you should really use the ones pr1.2 ships with. If you removed them and don't want to flash you device, you can install them at least from the sdk repository.