Question2Answer query failed:

(SELECT '0' AS selectkey, qa_posts.postid, qa_posts.type, LEFT(qa_posts.type,1) AS basetype, INSTR(qa_posts.type, '_HIDDEN')>0 AS hidden, qa_posts.acount, qa_posts.upvotes, qa_posts.downvotes, BINARY qa_posts.title AS title, BINARY qa_posts.tags AS tags, UNIX_TIMESTAMP(qa_posts.created) AS created, qa_uservotes.vote AS uservote, qa_posts.userid, qa_posts.cookieid, qa_userpoints.points, BINARY qa_users.handle AS handle, NULL AS tagcount, NULL AS content FROM qa_posts LEFT JOIN qa_uservotes ON qa_posts.postid=qa_uservotes.postid AND qa_uservotes.userid=NULL LEFT JOIN qa_users ON qa_posts.userid=qa_users.userid LEFT JOIN qa_userpoints ON qa_posts.userid=qa_userpoints.userid JOIN (SELECT postid FROM qa_posttags WHERE wordid=(SELECT wordid FROM qa_words WHERE word=_utf8 'crédit') ORDER BY postcreated DESC LIMIT 0,50) y ON qa_posts.postid=y.postid) UNION ALL (SELECT '1', NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, tagcount, NULL FROM qa_words WHERE word=_utf8 'crédit') UNION ALL (SELECT '_options', NULL, NULL, NULL, NULL, NULL, NULL, NULL, title, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, BINARY content FROM qa_options WHERE title IN (_utf8 'site_title',_utf8 'logo_show',_utf8 'logo_url',_utf8 'logo_width',_utf8 'logo_height',_utf8 'feedback_enabled',_utf8 'nav_unanswered',_utf8 'site_language',_utf8 'site_theme',_utf8 'neat_urls',_utf8 'custom_sidebar',_utf8 'custom_header',_utf8 'custom_footer',_utf8 'custom_in_head',_utf8 'pages_prev_next',_utf8 'page_size_tag_qs',_utf8 'voting_on_qs',_utf8 'votes_separated',_utf8 'show_user_points'))

Error 1242:

Subquery returns more than 1 row