Turns out, after all that fuss, that it WAS a permission issue. I was either using a different login when I was editing the MARC Coded Value Maps previously, or I somehow lost the permission.
I will dig around for a Launchpad bug to clear this up by asking for some sort of message, preferably a pop-up box, to show when this permission-based error occurs. Currently nothing happens, which is confusing. For reference, the permission needed to edit the MARC Coded Value Maps is 'ADMIN_CODED_VALUE'. Thanks to Jason and Lebbeous (Team Equinox) for figuring this one out! -Holly Holly Brennan Library Technology Specialist Homer Public Library 907-235-3180 (main) 907-435-3154 (direct) hbren...@cityofhomer-ak.gov