White spaces in Kmail (dark themes)

[Colin J Thomson]

Hi,

After the recent updates of qt5-qtwebengine there are white spaces in the 
message window when using a Dark Theme. 
Another user has just reported this on kde.bugs with a screen shot

https://bugs.kde.org/show_bug.cgi?id=379406

I don't know if it is a kmail or qtwebengine bug or even related to mesa/
nouveau saga.

Kmail 5.4.3
Plasma 5.9.5
Frameworks 5.33
Mesa-dri-drivers-13.0.4-3.fc25.nouvlock

Colin