Error message

• Notice: Undefined offset: 324 in node_gallery_api_get_item_position() (line 825 of /web/htdocs/www.faiponline.it/home/drupal/sites/all/modules/node_gallery/node_gallery_api.inc).
• Notice: Undefined offset: 324 in node_gallery_api_get_item_position() (line 825 of /web/htdocs/www.faiponline.it/home/drupal/sites/all/modules/node_gallery/node_gallery_api.inc).
• Notice: Undefined offset: 324 in node_gallery_api_get_item_position() (line 825 of /web/htdocs/www.faiponline.it/home/drupal/sites/all/modules/node_gallery/node_gallery_api.inc).
• Notice: Undefined offset: 1 in counter_get_browser() (line 70 of /web/htdocs/www.faiponline.it/home/drupal/sites/all/modules/counter/counter.lib.inc).