menu in Opera

the menu doesn't seem to be working with Opera 8.x.
on page "/index.php?q=admin/build/menu"

It prevents the user from finishing the installation...
Embarrassing, isn't it?

Code is

<div class="content">
<ul class="menu">
<li class="collapsed"><a href="/drupal_5.1/index.php?q=node/add">Create content</a><li>
<li class="leaf"><a href="/drupal_5.1/index.php?q=user/1" class="active">My account</a></li>
<li class="collapsed"><a href="/drupal_5.1/index.php?q=admin">Administer</a></li>
<li class="leaf"><a href="/drupal_5.1/index.php?q=logout">Log out</a></li>
</ul>

Jever