[Interest] Regression in 5.4.0rc Fusion or I'm doing something wrong?

[Stanislav Baiduzhyi]

Hi All,

I've upgraded Qt from 5.3.2 to 5.4.0rc yesterday (openSUSE 13.2 KDE:Qt5 
repository), and noticed following issue with it:
https://drive.google.com/open?id=0B5Kp-cB1sXJrX2xUSUswNUtwM28&authuser=0

Front window is KDE4 Krusader with Oxygen, left window is Qupzilla-qt5 
preferences. Notice the size of checkboxes, the size was almost identical to 
Oxygen with Qt 5.3.2.

Also, checkboxes in menus are crippled, instead of check mark there is strange 
artifact in the center of a checkbox.

Note: screenshot is made on 167 DPI 13" laptop, with font size 5pt.

Is that expected behaviour, or I have to do something after the upgrade to 
make it work properly?
-- 
  Regards,
       Stas