I've got some older PDFs for which the images that are embedded don't display properly. For some e-readers there is a particular way of saving them so that they work, so I'm suspecting the same is true for the Adobe Reader app on the PlayBook. Anyone know what the best version to save as is?
Is there a tool that would tell you what version a pdf file was saved as? If so, you could examine a few that seem to work and try emulating that version.
That being said, folks have discovered that some apps saveas PDF creates versions that are NOT compatible but I have not followed the discussions that closely. I recall one of the drawing apps created pdf files that would not read on the pb.
Tried qPDF Notes? Love that app! It has a "flatten document" function is which converts fancy PDF elements to a simple PDF format which can be displayed on most readers. Try free qPDF viewer first too in case it displays it properly.