This update bundles the following features: Windows Server 2008 support, SQL Server 2008 support, enhanced support for sharing tape libraries and better tape utilization.
Features Added:
1. Support for backing up virtual machines on clustered Virtual Server 2005 R2 SP1 hosts
2. Support for sharing tape libraries between multiple DPM servers
3. Better tape utilization of tape capacity by co-locating data from multiple protection groups with similar retention range
4. System state protection for Windows Server 2008
Download the x86 version
here, and the x64 version
here.