My wife reported that our officejet pro 8720 stopped printing in duplex mode recently. I re-ran easy setup and the problem persisted. I removed the printer and addeded it again via bonjour as "Secure Airprint". Duplex works when set up this way, even though it reports using version 2.0 drivers.
I set up the printer again selecting the full all in one drivers in the dialog, getting the 4.30 version number in the print queue screen. That copy of the printer fails to print duplex.
Is something wrong with the current version of the fancy drivers for this printer? Why does it duplex set up as airprint but not with the HP-provided drivers?
This is not a problem with print settings: the same print settings (two sided, long edge binding) produce single sided printouts on the 4.3 version of the drivers and double sided printouts on the OSX-included 2.0 version of the drivers. Please re-read my original post for the details, thanks