Interface design changes, a little constructive criticism
A couple of changes to the interface have made using the site more awkward. First, when doing a lesson, if you run out of hearts then the lesson is failed and the only option now is to go back to the Home screen. One cannot retry the lesson. Second, the main screen was split to have two slider bars. One for the tree and one for the follows and other stuff on the right.
That means when you are fairly far along in the tree and fail a lesson, you get sent back to the home screen all the way back to the top of the tree and have to scroll all the way back down to the bottom. Increasing the frustration is finding that you are scrolling the right hand pane of the window rather than the tree to get back to where you wanted to be.
I am sorry to say that I don't view either of these changes as real improvements.