I'm also seeing the same problem of Wingding fonts. Arial shows up as the default font but the text is displayed in the drawings using Wingdings :(
Anyone got this working or figured out how to fix the font issues? This happens when opening existing diagrams or creating new ones.
System Versions:
Visio 2003 Trial version
Crossover 6.0.0b1 Beta
Mac OS X 10.4.7
Visio on Mac ... so close but yet ... so far away ;)