Why do I tell people not to deploy update rollups until they are one month old? This is why. I have been told that the fix for DPM 2012 R2 UR2 is not a permanent fix, but more like a hack for a short term solution that you will have to repeat.
Microsoft has been forced to pull UR2 for DPM 2012 R2.
This is a complete mess. It appears that the problems we have been seeing with quality since System Center 2012 SP1 are continuing to cause trouble for customers.