Followup, ADE in the Show Information window said the document contained minor errors which might make it display incorrectly. I was able to solve the issues by downloading the trial version of Acrobat Pro 9, used its diagnostics to correct any errors, and saved the file. I still have no clue as to what was causing the issues, though I suspect it was font related. But it is beyond me to explain why two products written by the same darn company could not display the same PDF in the same way. And this company also designed the PDF file format!