This plug in used to work on my site, but I've updated both the plugin and WordPress since I last remember it doing its job. I'm now running WP 3.3.2 and Subscribe2 8.3. The site can send administrative emails (comment awaiting moderation, etc.) just fine, but not "new post" ones from Subscribe2.
One thing I've noticed is that no matter what setting I change in the settings page, once I leave that page and come back, the setting has reverted to the defaults. I'd like to be able to configure the settings, especially since I can't get it to send out notices when a new post is made.
I have also noticed that there are no rows in the subscribe2 table anymore. I had a few entries in there before I re-installed the plugin. If I'm using users from the site, will there be any users in that table or will it simply use the WP Users table?