I have released a hotix for version 2.0.8 of the digital shop.  This fixes an error that prevents emails from getting sent out to customers.  All users of 2.0.8 should apply this fix ASAP to make sure your customers are getting their purchase emails.  You can download this hotfix from Your Purchases.  Please read the included text file for the simple instructions to apply this hotfix.  The regular packages have also been updated to include this fix.