Hello Keith,
The font we have used in Proview, Helvetica, doesn't seem to be present in the latest linux releases, instead you get this ugly, unreadable default font. There has to be a way to install the Helvetica font, but I haven't managed to to that. Instead we have changed the font in 4.6.0-4 to another font. Installing this version, or preferably 4.6.0-6 which contains several bugfixes, will fix the problem.
If you choose to install Helvetica instead, please let me know how you managed to do that !
/Claes