Canon MX 510 won't print correctly for PDF. Word documents print full document while a document in Foxit Reader or Adobe Reader print a quarter of the page and shoot a blank page after that. I tried the following steps for Adobe Reader to try and resolve the problem... None work
Go to Edit>Preferences>Documents and set PDF/A mode to "Never"
Then go to Edit>Preferences>Security (enhanced) and deselect "Enable protected mode at startup.
If that doesn't work, you can always try selecting "Print as image" in the advanced print dialog.