I recently upgraded my VCO 5.5.1 to 5.5.2 and I noticed the VCAC host plugin portion quit displaying my catalogs etc, so I could not provision. I proceeded to upgrade the VCAC plugin to 6.1 and it fixed half the issues, but ultimately I rolled VCO back to 5.5.1 because I am waiting for the VCAC 6.1 Update 1 update before I try again.
Just an FYI
-Stephen