I've set up FishEye on a group uni project, using Mercurial. I've got two different explicit committer mappings, and am the only committer currently. So, voila, in the most active committers panel on the activity page of the repository, my avatar is listed twice.

We should check the mappings and coalesce any of the top committers that happen to be mapped to the same user.

See attached image for proof.