OK, so I'm loving the new printer that I have, but with the very first test I did I found a problem that almost made me think the printer (or the driver) were faulty.
In fact, it turns out that the problem is with Acrobat when you print double-sided. The first page comes out fine, but the last page (or in some cases all subsequent pages) come out as a mirror image of the real page, basically only making it useful for Alice through the looking glass or espionage.
The problem only seems to affect Intel Macs (from a programming perspective), is probably related to the endianess difference between PPC and Intel platforms, and seems to affect a wide range of printers. Just check the Adobe Forums.