How to cache gravatar avatars?
<p>How can I cache gravatar avatars for faster loading?</p>

<p>Currently I am just using a directly link:<br>
<code>&lt;img src="http://www.gravatar.com/avatar/' . md5( strtolower( trim( "privat@marktopper.dk" ) ) ) . '" alt="" class="comment-avatar"/&gt;</code></p>
