Alongside iPhoto 9.1.2, Apple also released a font update for Mac OS X Snow Leopard, which is aimed at fixing the OpenType text bugs we reported a few weeks ago. The update “addresses issues displaying and printing certain OpenType fonts”, but as Apple’s KB document notes, it also resolves issues with printing from Preview, as well as problems with PDF documents not opening in 3rd party PDF-viewing apps. Font errors with PostScript printers have been fixed, too.
If you’re an OS X 10.6.7 user and have been experiencing OpenType font rendering issues on your machine, the update is highly recommended. You can download it from Software Update or Apple’s website.