I just noted that without the '*' it does work, in other words, the following works:
QFrame[styleAsPresetPanel="true"] QPushButton, QFrame[styleAsPresetPanel="true"] QCheckBox { /* stylesheet */ }Allthough this is enough for me to continue for now, my original question remains. I'd expect this to work with the '*' as well, but that doesn't seem to work. Is that a bug I should file, or are my expectations wrong?