Back in 2006 I used Pages to make a brochure and ran into a problem with the print shop not understanding the PDF format from Pages '06. Heres the old AN thread about it:
http://forums.applenova.com/showthre...ight=Pages+PDF
Maybe this problem has been fixed in the '09 version, but back then I came to the conclusion that Pages (or was it the built-in OS X .pdf creator?) could not be trusted to deliver industry standard .pdf encoding.