Resetting capabilities for admin role in WordPress to the defaults, programmatically. I ran this through functions.php of the theme. List of caps copied from http://codex.wordpress.org/Roles_and_Capabilities#Administrator

gistfile1.php

<?php

$administrator = get_role( 'administrator' );

foreach (
  array( 'activate_plugins', 'delete_others_pages', 'delete_others_posts', 'delete_pages', 'delete_plugins', 'delete_posts', 'delete_private_pages', 'delete_private_posts', 'delete_published_pages', 'delete_published_posts', 'edit_dashboard', 'edit_files', 'edit_others_pages', 'edit_others_posts', 'edit_pages', 'edit_posts', 'edit_private_pages', 'edit_private_posts', 'edit_published_pages', 'edit_published_posts', 'edit_theme_options', 'export', 'import', 'list_users', 'manage_categories', 'manage_links', 'manage_options', 'moderate_comments', 'promote_users', 'publish_pages', 'publish_posts', 'read_private_pages', 'read_private_posts', 'read', 'remove_users', 'switch_themes', 'upload_files', 'create_product', )
  as $cap
) { 
  $administrator->add_cap( $cap );
}