Mine still isn't working. You would think if they would have tested and tested again before RTM and even picked it up when they saw people were having issues and put out a fix. I would surely hope that it's fixed by launch or they are going to be grilled.
Found another issue with Mail. When you go to send a message, it will show in the Outbox, go away and will not show up in Sent items. It will show in Drafts, but only the header.
If this is RTM, these issues need to be fixed prior to launch!