The update went smoothly once I figured out the correct email on my PE. I am not nearly the power users you are, but there is one odd navigation issue I noticed.

When I use the thumb-mouse to navigate the library it appears unresponsive. Once or twice it wouldn't allow me to tap books or music files, but did allow me to exit. When I tap the library everything was fine. This morning it appears it won't let me navigate within the library but does allow me to tap items. A minor thing, but interesting.

Thanks for everyone's help enabling this update!