Android SDK 2.1 was released including minor API changes and bug fixes. For information on changes and fixes, see the Framework API section.
If you install Android SDK in a multi-user environment or in a continuous integration server, as was showed in previous posts, you should correct the permissions after updating. That is android-fixperms's raison d'être and as usual, it was updated to support this new SDK version.
Find more information and examples at http://sites.codtech.com/android/android-tools.