list management page displays "Visit:" and "or:" in the wrong place.

Running drupal 5.1, mysql 5. I tried under several different themes and it does not appear to be a theme-related issue. Final output looks like this:

...
<div class="form-item">
 <label class="option"><input name="options1" value="4" class="form-radio" type="radio"> Mail password</label>
</div>
</div>
</div><a href="http://sol2.aptsolutions.com/mailman/listinfo/commteam">Mailman Interface</a><a href="http://sol2.aptsolutions.com/pipermail/commteam">Comm Team archive</a></div>
Visit:  or: </fieldset>
<p>Your current email address is currently subscribed to all lists.</p><p></p></div>

It's clear there's something going wrong, because the text is not showing up in the order that the code is assembling it - in fact, it's not even contained in the proper DIV tag.