I'm using the new Messages beta with my Gmail account and my iMessage account (which is linked to the same Gmail address). It's using a photo for my buddy picture that I've used before on various things, but I can't figure out why it's showing up here. It's not the picture associated with my Gmail account or my user account on this computer. I can't find the setting in Preferences where I can select a buddy picture, so it must be pulling it from somewhere in some account.
So: where does Messages get its user picture from?