A rollup is available for Microsoft System Center Virtual Machine Manager 2008 R2 which solves a couple of issues:

Issue 1: A high availability virtual machine with a GPT pass-thru disk is reported is reported as “Unsupported Cluster Configuration.” 

Issue 2: When you manage VMware Virtual Center that has distributed switches, the Virtual Machine Manager service (Vmmservice.exe) crashes.

Issue 3: After Quick Storage Migration is completed, the Failover Cluster Management MMC snap-in reports that the VM still uses the old CSV volume.

Issue 4: If a VM is configured with 3 virtual processors, the SCVMM Admin Console crashes.

Issue 5: The settings for the virtual network are incorrect after a Refresh-VMHost cmdlet job is completed.

KB982522:
http://catalog.update.microsoft.com/v7/site/Search.aspx?q=982522

Additionally an issue with the SCVMM Administrator’s Console is solved:

Issue: If a VM is configured to have 3 virtual processors, the SCVMM Admin Console crashes

KB982522 replaces http://support.microsoft.com/kb/976246 which solved this problem:

“In Microsoft System Center Virtual Machine Manager 2008 R2, you remove a virtual hard disk (VHD) from a virtual machine. You expect that the .vhd file is detached from the virtual machine. However, the .vhd file is actually deleted on the Hyper-V server”

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