Just installed daily build from 2017-06-03 and started it without existing settings directory. After invoking the print dialog, a click on preview or print button did nothing. Then quit jedit and attached activity.log.
Beside this, after changing margins in jedit print dialog I won one trial for preview and print ;-) : Now I'am able to print duplex, but it seems that only Windows printer settings (at least for duplex) are recognized.
In the "Print..." dialog, under the "Appearance" tab, there are radio buttons for "One side", "Tumble", or "Duplex" printing.
When I select duplex printing, the printer properly "prints" both sides of the paper, but the back side is blank. In other words, the front side prints, the printer retracts the page, and the back side prints; but all the text is on the front side only.
Other applications (e.g. acroread) print duplex properly using the lpr flag "-o Duplex=DuplexNoTumble").
How can I find (and fix?) the command jedit uses to print?