Media items get "absolute" path instead of relative and inject actual server name

Items stored in an acidfree album produce "absolute" paths to content items. For example:

<div class="acidfree-cell"><div class="acidfree-item acidfree-video"><div class='acidfree-thumbnail' style='width: 112px; height: 85px;'><a href="http://cerberus.fa.umt.edu/umarts/art_test/node/82" title="Test video"><img src="http://cerberus.fa.umt.edu/umarts/art_test/system/files/images/galleries/albums/tnail-thumbNq4zDd.thumbnail.jpg" alt="Video thumbnail for Test video"  width="100" height="73" title="Video thumbnail for Test video" class="image thumbnail" /></a>

There is no good reason to inject "http://cerberus.fa.umt.edu/" into the src value. I intend to use a proxy rewrite (traffic from http://www.umt.edu/art will proxy rewrite to fetch data from an internal server named cerberus.fa.umt.edu.) The server "cerberus.fa.umt.edu" will not be accessible via the web. These links should be relative to web root and all links should use the current context of the client browser instead. I'm still trying to figure out where these links are being generated so I can pull this out.