I'll follow, just like to add
it's been rock solid for 6 months, recent changes
1. addition of VMware Data Protection appliance.(currently now turn off)
2. integration with Microsoft SCVMM 2012 SP1 Beta (currently now turn off)
and still doing it every 45 seconds.
Now it's possible somebody has applied a lockdown firewall Group Policy to the OU!
that's a thought checking....