Sorry for my English not good...
After update Phocadownload from 3.0.6 to 3.1.0 on my site asl.varese.it, it shows this error message:
1054 - Unknown column 'a.c.title' in 'order clause' SQL=SELECT a.id, a.title, a.alias, a.filename_play, a.filename_preview, a.link_external, a.image_filename, a.filename, c.id as catid, a.confirm_license, c.title as cattitle, c.alias as catalias, CASE WHEN CHAR_LENGTH(a.alias) THEN CONCAT_WS(':', a.id, a.alias) ELSE a.id END as slug, CASE WHEN CHAR_LENGTH(c.alias) THEN CONCAT_WS(':', c.id, c.alias) ELSE c.id END as catslug FROM web314_phocadownload AS a LEFT JOIN web314_phocadownload_categories AS c ON a.catid = c.id WHERE c.id = 3 ORDER BY a.c.title ASC LIMIT 0, 5
Can anyone help me?

Thanks a lot!
