Release Candidate 1 is an improvement over the beta releases and corrects a number of issues. It also adds some new features and configuration options.
Running update.php is not required if you are running beta7. You should read the documentation on the new configuration options, however.
Note that the names of some permissions and menu items have changed.
New Features
Adds partial pgSQL functionality to Domain Prefix. See #200279.
#188275. Adds new permission 'view domain publishing' to provide domain selection options for node creation to users with limited permissions. These options are controlled by a new Content Editing Form setting.
Adds the ability to ignore the www. prefix when determining the validty of a domain request.
Adds configuration for pages that should allows the domain_all grant, such as mysite/* or user/*/track.
Adds configuration for node links that should be made absolute by hook_url_alter, such as node/%n, comment/reply/%n and book/add/child/%n, where %n is a placeholder for the node id. Allows the module to be extended through the UI.
Automatically adds and removed domain_editor grants when that feature is enabled and disabled.