I don't know what the data from flickr looks like, but it probably just comes in as text and SimpleViewer formats it. I would suggest using the sample caption form the link I provided as a base.
From:
<caption><![CDATA[<font face="Times" size="20" color="#ffff00"> Big times text</font><b>bold text</b><u><a href="index.html" target="_blank">link text </a></u><br>New line of text]]></caption>
To something like this:
<caption><![CDATA[<font face="Times" size="20" color="#ffff00"><b> The Title</b></font><br>the description]]></caption>
or
<caption><![CDATA[<font face="Times" size="16" color="#ffffff"> The Title</font><br><font face="Times" size="10" color="#ffffff">the description</font>]]></caption>
Mike Richards
SimpleViewer Support Team.