Left and bottom part of frame not nicely drawn in QFusionStyle with scaling 150%

When frames are drawn in QFusionStyle and the scaling is set to 150% the left and the bottom part of the frame are almost invisible (see bottom layer of attachment). The visuals improve if you set Antialiasing to true in a proxystyle (see middle layer). The best result is gained by also adding a fix found in qfusionstyle.cpp:

 //  ### highdpi painter bug. 
       painter->translate(0.5, 0.5);

This results in the good looking rendering found in the top layer of the attachment.