If you have ever tried viewing a Khmer Unicode document on a PC that was created on a Mac you might find that the font fails to render correctly. This is because Mac fonts do not completely follow the rules for Khmer Unicode in the same way that PC’s do.
But now Didi from SIL has revised his Mondulkiri font to deal with this issue. By using the Mondulkiri font, it will force you to type Khmer Unicode in a way that it will display correctly on both PC and Mac. This is a great step forward for Khmer Unicode.