There are true usability issues with version 5. For example, I have a stack and want to create 5 new folders in it. I'm on a Mac. There is no way to simply make a folder in the stack. When I make a new folder--it is alphabetized with all the others and I have to drag it onto the stack. This excessive work has to be repeated 5 times!!! This is silly and time consuming. Your design is based more on looking at notes already made--browsing--not on allowing users to be productive. Please--get the basics right.