Font Awesome icons disappear when editing page

Issue

Using Font Awesome icons in Expert disappears when saving the page.

Resolution

Add or move content inside empty <i> tags .  For example, replace

<a href="http://www.facebook.com/MindTouch"><i class="fa-facebook"></i>MindTouch</a>

With:

<a href="http://www.facebook.com/MindTouch"><i class="fa-facebook">MindTouch</i></a>

Cause

The Expert editor has a 'smart' feature that removes unnecessary HTML elements, so when it sees an empty <i> tag, it deletes it