JR sites going down...
Using Jamroom
If you're able to reproduce the error, outline the steps here. That may provide a clue as to what the issue is.
{foreach $_list as $_l0}
<li {if $_post.module_url == $_l0.menu_url}class="active"{/if}>
<a href="{if $_l0.menu_url|substr:0:4 === 'http'}{$_l0.menu_url}{elseif $_l0.menu_url|substr:0:1 === '#'}{$_l0.menu_url}{else}{$jamroom_url}/{$_l0.menu_url}{/if}" onclick="{$_l0.menu_onclick}" class="menu_0_link" data-topic="{$_l0.menu_url}">{$_l0.menu_title}</a>
{if is_array($_l0._children)}
<ul>
{foreach $_l0._children as $_l1}
<li>
<a href="{if $_l1.menu_url|substr:0:4 === 'http'}{$_l1.menu_url}{elseif $_l1.menu_url|substr:0:1 === '#'}{$_l1.menu_url}{else}{$jamroom_url}/{$_l1.menu_url}{/if}" onclick="{$_l1.menu_onclick}" >{$_l1.menu_title}</a>
{if is_array($_l1._children)}
<ul>
{foreach $_l1._children as $_l2}
<li><a href="{if $_l2.menu_url|substr:0:4 === 'http'}{$_l2.menu_url}{elseif $_l2.menu_url|substr:0:1 === '#'}{$_l2.menu_url}{else}{$jamroom_url}/{$_l2.menu_url}{/if}" onclick="{$_l2.menu_onclick}" >{$_l2.menu_title}</a></li>
{/foreach}
</ul>
{/if}
</li>
{/foreach}
</ul>
{/if}
</li>
{/foreach}
{xxYourCustom_something list=$_list assign="_list"}
{foreach $_list as $_l0}
....... the same stuff as it was before
{/foreach}