[PyQt] Setting text color for combo box fails on windows vista

[Markus Dahlbokum]

Hello,

I'm trying to modify the text color of a QComboBox via 
QPalette.setColor(QPalette.ButtonText, QColor). On linux there is no problem 
but on windows vista the color won't change. When I switch the application 
style to 'cde' the modification works.
Is there a known problem with the vista style?

Thank you,
Markus