Fix browsing by modifications, take into account every comment in a thread (instead of only the first two levels in each thread).
{% extends "site/layout/base.html" %}
{% load i18n %}
{% block content %}
<h1>500: {% blocktrans %}Server Error{% endblocktrans %}</h1>
{% blocktrans %}An error has occurred.{% endblocktrans %}
{% endblock %}