sroyalty

Same results here with .com list used.

So far it is partly like the 2.3 mod. Below is how my 2.5 shares. Now, this is for the same access across all shared blogs. I have not set it up to give unique access per blog.

wp-config.php in the 2nd, 3rd, etc (not first install though).
Before the line with define(‘ABSPATH’, dirname(__FILE__).’/’);

// Let's add the code for sharing a user db table within the wordpress database.
// Remember, all blogs must be installed to the same database, with unique prefix's.
// These entries point to the single blog's userbase to share.
define('CUSTOM_USER_TABLE', 'wp_users');
// Uncomment this to use the same usermeta globally for roles.
define('CUSTOM_USER_META_TABLE', 'wp_usermeta');

Then I made the following change to wp-includes/wp-capabilities.php
Find the line:
$this->cap_key = $wpdb->prefix . 'capabilities';
Change it too:
$this->cap_key = ‘wp_capabilities’;