Change this line in qa_page_q_post_rules(...) in qa-page-question.php:
$post['aselectable']=($post['type']=='Q') && !qa_user_permit_error($qa_db, $post['isbyuser'] ? null : 'permit_select_a');
... to ...
$post['aselectable']=($post['type']=='Q') && !qa_user_permit_error($qa_db, 'permit_select_a');