editing VLAN tag on OPT interface changes LAN interface instead
Changing the VLAN tag on my [renamed] OPT interface from "3" to "202" (to accommodate a change my upstream made) actually changed the VLAN tag on the [renamed] LAN interface instead.
I verified this in /conf/config.xml on the console, and fixed it by editing /conf/config.xml and rebooting.
(On a related note, the Developer Console appears to be non-functional now. Is there another way to reload config from the console?)
I'm going to re-test now just to make sure this isn't a PEBKAC issue.