I had this issue a few weeks ago...with twitter. I stumbled around and figured out how to resolve the issue, but can't really recall the steps. A neighbor from the blogosphere is now commenting on my site, and when you click their gravatar it takes you to facebook.. I am assuming this is the issue as instead of her blog name showing up on my comments, her real name is showing...? Any help is greatly appreciated. She doesn't want her name published, and she would like her gravatar click to take people to her wordpress blog, instead of farcebook...thanks.
The blog I need help with is sonsothunder.wordpress.com.