[Peter A. Gebhardt]

The code developed so far (resembling the buddyPress Forum experience):

...

<span id="topic_posts"><?php topic_posts_link(); ?>, </span>

<span id="topic_voices"><?php printf( '%s voices', bb_get_topic_voices() ); ?></span>

<span><?php if ( 1 < get_topic_posts() ) : ?>

<?php printf(__('- <a href="%1$s">Latest reply</a> from '),attribute_escape( get_topic_last_post_link()) ) ?>

<a href="<?php bb_option('uri'); ?>profile.php?id=<?php echo (sanitize_user(get_topic_last_poster(),true)); ?>"><?php echo get_topic_last_poster(); ?></a>



<?php endif; ?>

</span>

does only generate an “User not found.” error with:

..../profile.php?id=Test%20User