Hi there,
WordPress treats bbPress (and other custom post types) as a blog, so the blog sidebar layout applies for bbPress.
To override this, you can use a function like this:
add_filter( 'generate_sidebar_layout','generate_custom_bbpress_sidebar_layout' );
function generate_custom_bbpress_sidebar_layout( $layout )
{
// If we are on a category, set the sidebar
if ( is_bbpress() )
return 'no-sidebar';
// Or else, set the regular layout
return $layout;
}
Let me know if that helps or not 🙂