Microsoft (MSFT) has done a lot to see this product come to fruition, and I am genuinely impressed with the B2 TR bits.
With that stated, I learned quickly that the TR bits include new master pages, style sheets, and more significantly, different (and some removed) placeholders.
I will revisit/re-factor my approach to help with this change. In summary, if you have used my walk-through to deploy the sample custom chrome, the TR bits are not so different that you cannot tweak it and get it working. But they did make enough changes that if you apply the TR bits to a site you have taken my sample approach on - it will break your chrome / approach.
Such is the life of a beta tester :)
I'll cya soon!