Use the form helpers templatetag module in the addreviewer template.
--- a/pytask/templates/task/addreviewer.html Fri Feb 04 16:37:56 2011 +0530
+++ b/pytask/templates/task/addreviewer.html Fri Feb 04 16:38:21 2011 +0530
@@ -1,5 +1,9 @@
{% extends "base.html" %}
+
+{% load form_helpers %}
+
+
{% block content %}
Select a user as a reviewer for this task.<br />