Oops! It seems i had a few slips ;)

SELECT * FROM gallery2 WHERE topic_id="1263258" UNION SELECT * FROM gallery2 WHERE topic_id="1193706" UNION SELECT * FROM gallery2 WHERE topic_id="1450707" UNION SELECT * FROM gallery2 WHERE topic_id="819482" UNION SELECT * FROM gallery2 WHERE topic_id="1143912" UNION SELECT * FROM gallery2 WHERE topic_id="64763" UNION SELECT * FROM gallery2 WHERE topic_id="1718050" UNION SELECT * FROM gallery2 WHERE topic_id="720618" UNION SELECT * FROM gallery2 WHERE topic_id="1790428" UNION SELECT * FROM gallery2 WHERE topic_id="612399" UNION SELECT * FROM gallery2 WHERE topic_id="796059" UNION SELECT * FROM gallery2 WHERE topic_id="1415427" UNION SELECT * FROM gallery2 WHERE topic_id="1315966" UNION SELECT * FROM gallery2 WHERE topic_id="600813" UNION SELECT * FROM gallery2 WHERE topic_id="920238" UNION SELECT * FROM gallery2 WHERE topic_id="1729192"