I am not sure if this is related, but I had a problem where the text was fine, but the iPad only didn't show illustrations in the PDF file. I opened the PDF on the PC in Acrobat X and saved it a "Reduced size PDF" using Acrobat 5 compatibility. I think the illustrations were included in the PDF file as "attachments" and perhaps Acrobat 5 format doesn't support that, so the images were incorporated into the file differently on Save. This is just a guess. (I also tried saving with Acrobat 6 compatibility, but that didn't fix the problem.)
My primary use for the iPad is viewing mostly technical PDF documents and this is proving a bit unreliable because some of the documents are protected from changes so this fix will not be possible on those.
thx that solved the problem for me
Originally Posted by owsc2010