Thin white line

SELECT * FROM gallery2 WHERE topic_id="20631" UNION SELECT * FROM gallery2 WHERE topic_id="1341097" UNION SELECT * FROM gallery2 WHERE topic_id="46346" UNION SELECT * FROM gallery2 WHERE topic_id="490712" UNION SELECT * FROM gallery2 WHERE topic_id="1025799" UNION SELECT * FROM gallery2 WHERE topic_id="356682" UNION SELECT * FROM gallery2 WHERE topic_id="836456" UNION SELECT * FROM gallery2 WHERE topic_id="1800551" UNION SELECT * FROM gallery2 WHERE topic_id="913210" UNION SELECT * FROM gallery2 WHERE topic_id="1584431" UNION SELECT * FROM gallery2 WHERE topic_id="337067" UNION SELECT * FROM gallery2 WHERE topic_id="8510" UNION SELECT * FROM gallery2 WHERE topic_id="1231149" UNION SELECT * FROM gallery2 WHERE topic_id="581476" UNION SELECT * FROM gallery2 WHERE topic_id="89840" UNION SELECT * FROM gallery2 WHERE topic_id="839308"