Ошибка в SQL:

SELECT DISTINCT(n.id), n.* FROM news_categories_links ncl LEFT JOIN news n ON (ncl.news = n.id AND ncl.category IN (1)) LEFT JOIN material_tags_links mtl on (mtl.pid = n.id AND mtl.mid = 2) WHERE n.active <> 0 AND n.visible <> 0 AND n.date < NOW() AND mtl.tag IN(20) AND n.id NOT IN(631) ORDER BY n.date DESC LIMIT 1

Disk full (/var/lib/tmp_mysql/#sql_62d_0); waiting for someone to free some space...