Special:Whatlinkshere produces some invalid HTML markup. For an example see

http://en.wikipedia.org/w/index.php?title=Special:WhatLinksHere&target=Amazon_River

Now the syntax is:

<ul>

<ul>
  <li></li>
 </ul>

</ul>

it should be:

<ul>

<li>
  <ul>
    <li></li>
   </ul>
</li>

</ul>

I think the error occured in r33602

Version: unspecified
Severity: normal