<Editing notes spotty and problematic. Support confirmed that note editing is cranky.>

I agree. I am having problem too especially when using the magic mouse when scrolling the notation window. You can scroll the notation window sideways (from left to right or right to left of notations) by scrolling the magic mouse up and down. It is kind of weird. It does not take advantage of the magic mouse which is capable of scrolling sideways and up and down. I hope the next updates address this issue too.