annie hearts on "strange blob in commenter's username"

Hi,

A weird thing is happening to my commenters' usernames. There's a blob that appears on all commenter's names.

It happened in the same spot on two different comments (the only two comments I have so far:

http://anniehearts.com/blog/?p=91#comments

http://anniehearts.com/blog/?page_id=9
(scroll to the bottom of this page as it doesn't have an anchor to get to comments)

Anyone know what to do with this?

Thanks!
Annie