[Development] Why the UI font is not clear on Windows?

[Loaden]

Look the UI, Why the font is not clear?
The UI is very ugly? I lost some settings?
I noticed this issue some months, but it still exist on current master
branch.
Need help for this, thanks!
If you can't got the attenments, please see:
http://loaden.googlecode.com/files/font.png
http://loaden.googlecode.com/files/qt5.png

-- 
Regards
Loaden
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