<r>phpmyadmin select database phpBB3 query paste the following then exec 
<CODE><s>[code]</s><i>
</i>SELECT  topic_title, topic_time, forum_id, topic_first_post_id, topic_first_poster_name, topic_id, topic_poster, COUNT( * ) TotalCount
FROM phpbb_topics
GROUP BY  topic_title
HAVING COUNT( * ) &gt;1
<e>[/code]</e></CODE></r>