The Gravatar, also known as globally recongnized avatar, has recently been completely rebuilt under the PHP platform by the Automattic development team. Now your gravatar photos will be clearer, larger, and load much faster.
Other Gravatar Information
Quick Fix
I added this to my comments.php code:
<img align=”right” src=”<?php gravatar(”R”, 60, “http://yourblog.com/images/your-gravatar-image.gif”); ?>” alt=”Gravatar” />