I ran into a minor bug this morning -- characters with the new Operation: Shieldwall rings equipped are showing up as empty via the API, e.g.
https://eu.battle.net/api/wow/character/Quel'Thalas/Babadochia?fields=items

finger2 is missing, but this person definitely has it equipped:
http://eu.battle.net/wow/en/character/quelthalas/Babadochia/advanced

Not a huge deal, but thought I'd post a concrete example if it helps.