[rtrm]

We fixed it. For the benefit of anyone with a similar problem in the future our modified code is below (in red):

				<dl class="userinfo_extra">
<vb:if condition="$post['field6']">
<div><dt>Main</dt> <dd><a href="http://eu.wowarmory.com/character-sheet.xml?r=Doomhammer&cn={vb:raw post.field6}" target="_blank">{vb:raw post.field6}</a></dd></div>
</vb:if>
					<vb:if condition="$post['joindate']"><dt>{vb:rawphrase join_date}</dt> <dd>{vb:raw post.joindate}</dd></vb:if>
					<vb:if condition="$post['field2']"><dt>{vb:rawphrase location_perm}</dt> <dd>{vb:raw post.field2}</dd></vb:if>
					<vb:if condition="$post['age']"><dt>{vb:rawphrase age}</dt> <dd>{vb:raw post.age}</dd></vb:if>