Drupal 4.7.x

HI all
I am running a multisite setup in 4.7 the original runs fine however one of the subsites has developed the following error message when uploading images:

# user warning: Duplicate entry '13741' for key 1 query: INSERT INTO files (fid, nid, filename, filepath, filemime, filesize) VALUES (13741, 2304, 'thumbnail', 'images/agnik3.thumbnail_0.jpg', 'image/jpeg', '2970') in /homepages/19/d167162193/htdocs/litko/includes/database.mysql.inc on line 120.
# user warning: Duplicate entry '13742' for key 1 query: INSERT INTO files (fid, nid, filename, filepath, filemime, filesize) VALUES (13742, 2304, 'small', 'images/agnik3.small_0.jpg', 'image/jpeg', '8777') in /homepages/19/d167162193/htdocs/litko/includes/database.mysql.inc on line 120.
# user warning: Duplicate entry '13743' for key 1 query: INSERT INTO files (fid, nid, filename, filepath, filemime, filesize) VALUES (13743, 2304, 'medium', 'images/agnik3.medium_0.jpg', 'image/jpeg', '17309') in /homepages/19/d167162193/htdocs/litko/includes/database.mysql.inc on line 120.
# user warning: Duplicate entry '13744' for key 1 query: INSERT INTO files (fid, nid, filename, filepath, filemime, filesize) VALUES (13744, 2304, 'img_assist_properties', 'images/agnik3_0.img_assist_properties.jpg', 'image/jpeg', '8777') in /homepages/19/d167162193/htdocs/litko/includes/database.mysql.inc on line 120. 

I have created a node module. In module_menu function I put

$items[] = array('path' => 'node/add/xxxx', 'title' => t('xxxxx'),
'access' => 1,'type' => MENU_LOCAL_TASK);

It is not displaying the menu on page. I want to display this menu when user access this module.

Plz help

After I set Autosubscribe for all the users. The system sometimes failed to send a notification to the user when someone made a comment to his/her post. Can anyone help?

It seems to me that the current version of Subscriptions Module (for Drupal 4.7) cannot let the administer to administrate users' subscriptions. A web site may want to have the control on what content a user can subscribe, say base on certain category.

I'm working on a site using organic groups, and I would like to create the groups in such a way that there is a static page for the home page of each group, with links in the menus to blogs and photo galleries. I tried to create the page using the page content type, but it still allows other items on the page. Do I need to use a separate module (like front_page) for the static group main page, or can I use a core content type?

Thanks.

Wonder95