I went through the same thing with ours and it got corrupted to the point that it wouldn't work. I had to deploy a new 5.5u1 appliance. A couple weeks later I'm having issues with java consuming all cpu on the appliance. You will notice this in the vc UI with stale or non-existent objects.
I so want this appliance to work for us but my gut says it's still not ready. damn it.