When I delete a page in Mac Preview, or combine two PDF in Mac Preview, they will open and display in other users Preview, but will not open in Mac or Windows Adobe Reader (or Acrobat). An error message appears that states "an error exists on this page. acrobat may not display the page correctly. please contact the person who created the PDF document to correct the problem" and only shows blank pages. I have the most recent Preview and most recent Adobe Reader. I have tried uninstalling and reinstalling Adobe (including using the cleaner).