Just installed this nice little gem.
Selected to show Members and forum Contributors only, it shows fine in the [Week] window, but in [Month], [Year] and [All Time] everyone is shown.
I'd preferred if it wouldn't show the staff members (WM, Admins, Super Mods and Mods), so I disabled it again.
I'll follow this topic and see later if there's an update for it.
Cheers,
Edit
Just found the Top Contributors Plus topic. Is that application similar to this one?