The custom images for chatrooms is working just peachy, except for now going to the chatroom search screen throws...

Unhandled Exception ("PhabricatorDataNotAttachedException")
Attempting to access attached data on ConpherenceThread (via getImages()), but the data is not actually attached. Before accessing attachable data on an object, you must load and attach it.

Data is normally attached by calling the corresponding needX() method on the Query class when the object is loaded. You can also call the corresponding attachX() method explicitly.