WordPress MU

I'm having trouble figuring out why some of my site blogs are repeating user names in the comment titles - see http://southernsteppa.com/somefreak/2007/01/14/the-master/#comments - yet others seem to be fine - see http://southernsteppa.com/kodama/2007/01/08/festivous/#comments - both blogs are using the same theme, so is there something else that could be affecting this?

The one with the error has the comvatars plugin on, that's what doing it.

Just a guess though, based on looking at the source of both pages.

Spot on! Thanks so much.