Hi. I have an HP Color LaserJet 4700dn installed through my network, which was discovered by system-config-printer, and installed using the HPLIP connection. Unfortunately, whenever I try to save job options to duplex (i.e., flip long edge), the setting automatically reverts to one-sided; if I click apply in the printer settings, it immediately goes back to one-sided, and if I click OK, the next time I open the printer settings it's back to one-sided. I've tried running system-config-printer from terminal as root as well, same thing.
Anyone have any ideas?