Most noticeable change for this release will be new icon. Not a huge change, but a colorful one. Considering that last icon was gray-scale, I see it as a good change.
Other visible change would be New disk dialog. It is changed a bit in order to allow for more flexible size entry. Finally you can create 0.1337 GB hard drive that you always wanted.
Under the hood there were many changes. While some were bug-fixes, most of them were focused on drive management. This will finally give possibility of drive letter change in next version (currently being tested).
Download is available from within application or via program pages.
P.S. If someone is interested in checking drive letter management beta all you need to do is to send me a mail.