This should finally fix the remaining font issues, caused by not having explicitely...

This should finally fix the remaining font issues, caused by not having explicitely specified
a font for the default format. Even though the docs say that "the default font is used" in that
case, obviously it wasn't used correctly...
Now even fresh installs (with no custom font set) should display correctly. Please let me know
if that also works on Windows and MacOSX, or if any issues remain.