Avatar cache
The avatar cache is awfully broken. In combination with notifications (using notification-daemon), it seems it doesn't work at all. I often see old avatars in notifications, awfully old avatars. And if I clear the avatar cache, I don't see any avatar in the notifications anymore at all. It looks like there actually are resized avatars in the avatar cache for notifications, but it seems they aren't used. I think we really should have fixed that before 0.12