There is a hotfix rollup package available for DPM which addresses a number of issues that many customers encountered.
The issues resolved are:
Issue 1
If you enable library sharing, you cannot delete a protection group, and you receive the following error message: "Cannot promote the transaction to a distributed transaction because there is an active save point in this transaction."
Issue 2
The SharePoint backup process fails if DPM cannot back up a content database. If you install this update, the SharePoint backup process will finish. However, an alert will be raised if DPM 2007 cannot back up a content database.
Issue 3
DPM 2007 jobs randomly fail. In the administrator console, you see error code 0x800706BA if you check the detailed information about the failed job.
Issue 4
DPM 2007 does not delete directories that are no longer being protected from the replica volume.
Issue 5
DPM 2007 performs a Volume Shadow Copy Service (VSS) full backup. Because the transaction logs are deleted when the DPM 2007 backup job is completed, this backup may interfere with other applications that are backing up transactional applications such as Microsoft SQL Server or Microsoft Exchange.
After you install this update rollup, you can configure DPM 2007 to perform VSS copy backup. This means that the application transaction logs will not be deleted when the DPM 2007 backup job is finished.
To configure DPM 2007 to perform VSS copy backup, add the following CopyBackupEnabled registry value under the following registry subkey:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft Data Protection Manager\Agent\2.0
Registry value: CopyBackupEnabled
Type: REG_DWORD
Value Data: 1
Issue 6
Reconciling a VSS shadow copy causes the DPM 2007 service to crash.
Issue 7
The DPM 2007 service crashes if a tape backup job is canceled during the CheckConcurrencyBlock operation.
Issue 8
The Pruneshadowcopies.ps1 script cannot delete expired recovery points.
Issue 9
If a parent backup job of a SharePoint farm fails, but the child backup succeeds, the DPM 2007 service crashes.
This hotfix also includes the following previously released rollups for Data Protection Manager 2007 Service Pack 1:
961502, 963102 & 968579
Download link: http://www.microsoft.com/downloads/details.aspx?FamilyID=aee949aa-d3e7-4b0f-b718-00b7c20f1257&displaylang=en