- Tray Status Icon
  The annotations on the tray icon now show up-/download and backup activity
- New Sharing UI
  We have simplified the sharing process. For a description see here
  http://www.wuala.com/blog/2011/03/better-sharing-experience.html
- Fixed a bug that lead to undeletable items in the trash
- Improved Search
  We now save a search index on disk and update it upon changes. This
  means search should be near instantaneous after the first time.
- CbFS file system integration is now the default. If you are running
  into trouble, you can enable the old behaviour by passing "-useDokan" on
  the command line. Don't forget to file a bug report to let us know about
  any remaining problems.
- improved navigation in comments
- improved drag feedback on Mac
- we will start blocking contents for users who are A LOT over their
  quota in the near future. When you encounter such a file, there will be
  a context menu "take ownership" that lets you take over the file. Of
  course, the file will count against your quota afterwards.

Addendum:
- Deactivated uPnP as it caused trouble with some routers and didn't work well
  anyway.