Some PDFs created by MS Word 2007's Save as PDF feature (on Windows) don't display correctly on Mac OS using the built-in PDF handling. They display correctly using Acrobat, Photoshop, Inkscape, or probably any other app that uses it's own PDF rendering, rather than the native quartz rendering. This problem is also visible when viewing the PDFs on an iPhone / iPad.
There is a discussion here, but it doesn't have an useful answer.
Is there anything that can be done in Office 2007 on Windows to make it create PDFs that don't have this problem?