Exchange documents between PC <-> Mac

To exchange documents between PC <-> Mac, you must use any fonts start with VNI- such as: VNI-Times, VNI-Helve and have the same application also same version on both machines. 
Windows                       Mac
=======                       ===
MS Word 97      <==>    MS Word 98
MS Word 95      <==>    MS Word 98, MS Word 6.x
Pagemaker 6     <==>    Pagemaker 6
QuarkXPress 4   <==>   QuarkXPress 4