[Detective]

This is what I use in my forums:

function gs_bp_forums_add_allowed_tags( $allowedtags ) {

if ( bp_is_group_forum_topic() ) {

$allowedtags['img'] = array( 'src' => array() );

$allowedtags['del'] = array();

$allowedtags['p'] = array();

$allowedtags['br'] = array();

$allowedtags['cite'] = array();

$allowedtags['blockquote'] = array();

$allowedtags['h3'] = array();

$allowedtags['strong'] = array();

$allowedtags['em'] = array();

}

return $allowedtags;

}



add_action( 'plugins_loaded', 'gs_configure_forum_filters' );



function gs_configure_forum_filters() {

remove_filter( 'bp_get_the_topic_post_content', 'attribute_escape' );

remove_filter( 'bp_get_the_topic_post_content', 'convert_smilies' );

remove_filter( 'bp_get_the_topic_post_content', 'convert_chars' );

add_filter( 'edit_allowedtags', 'gs_bp_forums_add_allowed_tags' );

}