The interface for registering (after installation) is scrunched down and unreadable. No text is displayed and the GUI is "squished" so all you can see when you mouse over it is some buttons (no text or description or icons) and a thin input field. Also, once I was able to guess and enter in the activation code, the main interface is also messed up, you can see some checkboxes, but no text and it basically unuseable.
This behavior occurs in both the KDE spin and Gnome 3.4. I was running Fedora 17 in a Virtualbox 4.1.16 with Desktop effects enabled and Guest Additions 4.1.16 running.