MySQL ERROR:<br /><br />Error Number: 1109<br /><br />Description: Unknown table 'md' in field list<br /><br />Query: SELECT t.topic_id, t.author_id, t.title, t.body, t.topic_date, t.thread_total, t.last_post_author_id,  t.last_post_date, t.topic_edit_date, t.parse_smileys,
								f.forum_html_formatting, f.forum_auto_link_urls, f.forum_allow_img_urls,
								m.screen_name AS last_post_author,
								a.screen_name AS author, a.email, a.url,
								md.m_field_id_1 AS author_organisation,
								md2.m_field_id_1 AS last_post_author_organisation
							FROM exp_forum_topics t, exp_forums f, exp_members m, exp_members a
							WHERE t.last_post_author_id = m.member_id
							AND f.forum_id = t.forum_id
							AND a.member_id = t.author_id
							AND md.member_id = t.author_id
							AND md2.member_id = t.last_post_author_id
							AND t.announcement = 'n' 
							AND (t.forum_id IN (6) OR t.moved_forum_id IN (6))
							ORDER BY last_post_date DESC, topic_date DESC
							LIMIT 10