When an Application is started it obtains focus as soon as the QApplication is executed.

I expect that the Application only gets focus once it shows it's windows (unless flags like WindowDoesNotAcceptFocus are set). Qt 4.8 behaved that way.

This makes it impossible to have silent/stealth background process which has the possibility to show a window if needed.

QCoreApplication won't obtain focus, but you can't have Widgets with QCoreApplication.

There is a small example attached which showcases the issue.