So, this suggestion just got implemented: Show profile picture in chat autocomplete
That is very cool, and I'm happy with it. However, there's a chat user who has the special privilege of showing up with two avatars in the autocomplete suggestions in the RPG Chat Room:
I suspect this is a bug.
The above screenshot was with Windows 8 Firefox Aurora 34.02a, but others in the same room confirm it, including users of OS X Chrome 37.0.02 and Linux Chromium.