Created attachment 39789 [details]
When opening the "Internet Services" page of Amarok's configuration dialog, which prominently displays a KPluginSelector widget, the visual result is completely borked (see attached screenshot) and the app goes into a 100% CPU usage loop and stops reacting to clicks.
The Amarok version used is current git, which should be equivalent to the current Amarok 2.2.2. KDE is 4.4rc1.
The problem goes away when Amarok is run with "--style plastique".
At the same time, the KPluginSelector in the Desktop Effects KCM is fine, however.
Oh, and: Qt is 4.6.0.
The same happens with QtCurve. Maybe KStyle is the culprit?
*** This bug has been marked as a duplicate of bug 213068 ***