[OS X TeX] Font problem on printing

[Jung-Tsung Shen]

I am asking for my boss, who was a long time Word user and recently
started using LaTeX.

The typesetting and compiling was fine on his computer, but when he
printed the file, the font got screwed up -- the text font was not
right and the mathematical formula were all wrong.

What could be the causes for this and what are the solutions? His
system is OS X 10.5 + MacTeX + TeXShop.

Thanks for any comments and suggestions.

JT