What causes blurry fonts in Qt applications (in XFCE desktop)?

Question

I am using Xubuntu 12.04 with XFCE 4.8

Fonts in Qt-based apps like VLC look blurry in my user profile, as if anti-aliasing was turned off. Chrome has the same problem.

The problem is not system-wide though: in another user profile on the same machine, I have tried a couple of Qt applications and they look fine there.

Answer 1

I found this post: http://ubuntuforums.org/showthread.php?t=2032512

In my case, it was enough to remove ~/.config/xfce4/xfconf/xfce-perchannel-xml/xsettings.xml (I removed ~/.cache/sessions too). I still don't know the real reason for the problem though.