[jawittdesigns]

I still haven’t been able to find where the & character conversion is taking place, but I have managed to get it to work.

Here’s the class I’m using

class JPM_BBP_Support {

    /**
     * Initialize the class and set its properties.
     */
    public function __construct() {
        add_action( 'plugins_loaded', array( $this, 'custom_jetpack_markdown_support' ) );
        // Remove the back_code_trick filter
        remove_filter( 'bbp_new_reply_pre_content',  'bbp_code_trick',  20 );
        remove_filter( 'bbp_new_topic_pre_content',  'bbp_code_trick',  20 );
        remove_filter( 'bbp_new_forum_pre_content',  'bbp_code_trick',  20 );
        remove_filter( 'bbp_edit_reply_pre_content', 'bbp_code_trick',  20 );
        remove_filter( 'bbp_edit_topic_pre_content', 'bbp_code_trick',  20 );
        remove_filter( 'bbp_edit_forum_pre_content', 'bbp_code_trick',  20 );

        add_filter( 'bbp_get_reply_content', array( $this, 'custom_con_char' ), 6 );
        add_filter( 'bbp_get_topic_content',  array( $this, 'custom_con_char' ), 6 );
    }

    /**
     * Replace instances of < and >
     * with < and > when pulling the content
     * from the databse to display
     * 
     * @param  string $content the content stored in the database
     * @return string          the formated content
     */
    public function custom_con_char( $content = '' ) {
        $content = str_replace( '<', '<' , $content );
        $content = str_replace( '>', '>' , $content );
        return $content;
    }

    /**
     * Add Markdown support for BBPress Froums
     */
    public function custom_jetpack_markdown_support() {
        add_post_type_support( 'topic', 'wpcom-markdown' );
        add_post_type_support( 'reply', 'wpcom-markdown' );
    }
}

$jmp_bbp_support = new JPM_BBP_Support();

[jawittdesigns]

No, that adds custom post type support by looping through the custom post types using the add_post_type_support() function. I already have that set.