The code is simply this in the startscript:
msg <one two||three four|nfive>
Seems like the richtext box resets the font on every new line - and that font isn't the 'default'.
.. I don't remember this problem effecting me before (although I did just re-install wine and Quest to find a problem in my library - it was causing major lag).
BTW - Quest works almost flawlessly through wine now - only problem is you need to get MFC42.dll > 6.xx and regsrv32 it (and possibly regsrv32 an ocx file) and then you have it.