I haven't looked at your error log (I'm not awesome enough to interpret them), but I had a similar problem.
I had been using TwoJeff's old painting-based visitor controller. Taking it out fixed the problem. The old visitor controller is not compatible with BV. Head on over to
Inteen, and download TJ's beta version of the Visitor Controller, which is BV-friendly. You'll need to register over there to be able to access TJ's beta stuff.