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The problems existed before the extra ground wire to the battery was run. The original ground is about four inches in length. I agree a redundant ground can be a problem, not if the wire to the second redundant wire is directly to the ground post of the battery.

All connections are in tight, and the VCIM connections were never touched.

Spend a lot of time this evening on AVIC411, the Bluetooth echo is talked about in many forums. I have to agree with a few, it might be that the mic is not a sound cancellation mic, and that the sound from the speaker is feeding back into the mic.
As for the screen going to the map when the phone book is requested, many are experiencing this, and some only experience it if calling while on the map screen, but not when on the AV screen. I will check this out tomorrow, but still, doesn't sound right.
I just wrote pioneer a very long bitch letter. I am quite sure they are well aware of the problems, and if it is as simple as a new mic design, then I would hope the would be in the development stage at this time.

I know now, that next year when I sell the H3, the Pioneer nav can go with it, and I'll just pay for the overpriced H3 optional NAV unit. At least Onstar will work without an alternator whine.