Systemsettings crashes on adding Window-Specific overrides

[TimeManx]

If I try to add a window-specific override for the oxygen window decoration, systemsettings just crashes.
I've had this problem since 4.7.1 (maybe 4.7.0 too but i hadn't tried). It could be because I'm using QT 4.8 RC1 but I don't even remember if had it with KDE 4.7.1.

If someone can even tell me the file to save the settings to, that would be helpful too.

[TimeManx]

It's an upstream bug in Qt 4.8. Here's a bug report on the KDE Bug Tracker.
Although the bug hasn't been fixed in Qt yet, a workaround will be implemented in KDE 4.8 which avoids the use of QSharedPointer.