QSplashScreen broken in Qt 4.8

QSplashScreen shows a grey rectangle until the main window is mapped. This is a regression from 4.7. Also see https://bugreports.qt-project.org/browse/QTBUG-23317:

Boudewijn Rempt added a comment - 23/Jan/12 12:46 PM

I think it's even more broken. Using Qt 4.8, applications like Choqok and Krita show an empty gray splashscreen until the main window is shown, then the image is briefly shown.
Matthias Varnholt added a comment - 09/Feb/12 9:07 AM

Workaround:

splash.showMessage(tr("decrunching while loading..."));

fixed the issue here.
Mehrdad Momeny added a comment - 04/Mar/12 5:15 AM

Same problem here with Choqok,
The workaround Matthias gave is not working fine enough
Boudewijn Rempt added a comment - 04/Mar/12 10:52 AM

I figured out that it has to be real text - writing space character isn't enough - and it needs to happen at the right moment. Though that's different for krita than for choqok.