Modified the implementation of the avatar tag to look for an attribute 'user_profile' on the user object. If present, this is assumed to be the profile. This improves the performance of the member list and some forum views.

Dear {{ to_name }},

Your friend, {{ sender_name }}, wanted to send you a link to an 
interesting story found on {{ site_name }}.

{{ story_title|safe }}
http://{{ site_url }}{{ story_link }}

Thanks!
http://{{ site_url}}