Ok, found the solution after many hours of digging around the web.
Seems when changing win 7 to the smaller DPI, it does not change some font sizes.
A registry edit fixes the issue.
http://blogs.msdn.com/b/developingfordynamicsgp/archive/2009/11/25/windows-7-bitmap-fonts-and-microsoft-dynamics-gp.aspx?CommentPosted=true