I just installed ngg 1.8.4 on a fresh wp 3.2.1.
When I try to upload a ZIP file with images it says
"Database error. Could not add gallery!"
The webserver logs show
"[19-Nov-2011 19:05:53] WordPress-Database-Error Field 'slug' doesn't have a default value for the query INSERT INTO wp_ngg_gallery (name, path, title, author) VALUES ('****', 'wp-content/gallery/****', '****', '1') from do_action, call_user_func_array, nggAdminPanel->show_menu, nggAddGallery->__construct, nggAddGallery->processor, nggAdmin->import_gallery"
I'd say the error occurs in the function import_gallery in file ngg/admin/functions.php, where no value for slug is provided (line 173).
What's the best way to fix this?