Why do some Adobe PDF files not open in Preview? I've noticed problems every once in a while where a PDF file was generated by Adobe products, and in another case, my taxes from Turbotax.com. A paper accepted for publication that my advisor sent me related to my masters thesis and generated by Adobe Acrobat could not be opened in Preview. My taxes from Turbotax.com also could not be opened in Preview. When these documents were opened in Adobe Acrobat Reader and printed as (saved as) PDF documents again, then Preview could display them. What is or could be the source of the problem?
Also, when these Adobe generated PDF files are viewed in Adobe Acrobat Reader, scrolling is painfully slow. When the PDF files are re-saved so Preview can display them, scrolling is still painfully slow. When I generate my own PDF files within OS X apps, scrolling is fast. What might be the source for that annoying feature?
2.0 GHz Intel Core2Duo, 4 GB RAM, LaCie BigDisk Extreme 500 GB HD, External Pioneer A109 DVD superdrive, External LiteOnLiter CD burner, iSight video camera, 5th generation 60 GB video iPod, 4th generation 40 GB iPod, 1st Generation iPod Touch, Philips 32" HDTV with HDMI input, KDS Radius 19" LCD Display, Mac OS X 10.6.7.