Jim, get better fast, and when you do post another thread about the tar seams, please do mention it here. I'd be very curious to hear more about it.
I've ridden over those tar seams when they were new and fresh in Medford, right when the guys were still in the truck with the giant gun spraying them down on the cracks, but I guess the pavement wasn't hot enough outside for the stuff to grab me -- or maybe the stuff was so hot that it wasn't "sticky" yet. I seem to recall they left weird residue on my tires. Drove over them fresh with my car tires as well -- same thing, and very weird sounds as the residue flung around in the wheel wells.