We've just updated all the themes from the store with some minor changes. In particular, the Facebook themes were updated for better compatibility with SocialEngine and the MySpace theme was updated with a whole bunch of bug fixes.
How to update:
1. Buy the themes from the store (they're free) if you haven't already.
2. Visit your store purchase page http://www.arrowchat.com/members/store.php?do=purchases
3. Download and upload to your server
4. Hit "Update" next to the theme in the admin panel.