If you are printing from Ubuntu Linux to an HP Envy 4500 printer and try to print a document with a very small top border, you may find that the printer chops off the very top quarter inch of the page.
The fix I found was to change the paper size from “US Letter (11 x 8.5)” to US Letter Borderless (11.14 x 8.72)” in the print drivers.
I have read several places online where other users with Mac’s and Windows machines have the same issue when printing over wifi, so I feel the issue is with the printer itself (and it’s wifi to printing bridge) as opposed to the Linux drivers.