Win 7 Pro 64 bit.
Wow, the ebook viewer is *insanely* fast now. Previously, I thought maybe something was wrong on my end when I used the ebook viewer because it could take 15 seconds to "load flow" (or something like that) on every book. It is now pretty much instantaneous. I haven't tried much of anything else yet but I specifically wanted to test the ebook viewer first.
Thanks for the update!