[Qt-interest] Bad default font rendering in vista 64bit

[spam]

I am using Qt 4.5.0 compiled on windows vista 64bit. The default font
for my windows is Segoe UI 8pt.
So Qt is using this font by default. The problem is that it is rendering
that font very badly. It looks fine
in all the other windows applications that use it. Here is a screenshot
of what it looks like:
http://img27.imageshack.us/img27/1170/qtbadfont.png

Pay close attention to the letter 'B' in this image:
http://img27.imageshack.us/img27/483/qtbadfont2.png

Obviously I can get around this by doing a QApplication::setFont, but I
was wondering if there was a way
to either tell Qt to use a different default font for all my
applications, or to fix this problem.