Got the following when adding my first set of pictures:

Notice: Undefined index: uploads in /var/www/piwigo/admin/photos_add_direct.php  on line 207

Warning: implode() [function.implode]: Invalid arguments passed in /var/www/piwigo/admin/photos_add_direct.php on line 217

Warning: pg_query() [function.pg-query]: Query failed: ERROR: syntax error at or near ")" LINE 4: WHERE id IN () ^ in /var/www/piwigo/include/dblayer/functions_pgsql.inc.php on line 107
UPDATE piwigo_images SET level = 0 WHERE id IN () ;
ERROR: syntax error at or near ")" LINE 4: WHERE id IN () ^