Using Win 7 Pro with FM14v3 you can create pdfs using save as pdf that will error when you open in Adobe Reader.
The error is "An error exists on this page. Acrobat may not display the page correctly...."
To recreate the bug:
-Be on Windows & FM 14.
-Have a (print) layout with multiple portals where the first portal to be rows 1..8 and the next portal 9 .. 15 and the next portal 16 ..25 etc.
-Set the portals and object to Sliding up based on All object above
-View a record that doesn't have data in all the portals
-Save as PDF
-Open in Acrobat Reader (XI)