Due to new WordPress theme requirements, some code was changed and this has casued the feed not to validate. This can be fixed by editing bfa_meta_tags.php and changing line 69 from
HTML Code:
return trim( $title ) . " « " . get_bloginfo('name');
HTML Code:
return trim( $title ) . " & # 0 1 7 1 ; " . get_bloginfo('name');
or you can replace the existing bfa_meta_tags.php with the attached file.