@ted,
Actually, you can feel free to disregard this. I ultimately traced the issue back to a plugin that hooked into the UserScoreSerializer that implemented its own narrow .select() statement. It wasn’t apparent initially because there was no backtrace provided in /logs for the MissingAttributeError. Only after digging through and making the call manually through rails to get a full stack trace was I able to pinpoint the errant plugin.
Thanks, and sorry for the false alarm!