The sidebar which allows the user to select the items which should be visible in the file view can be hidden and the user has a very nice popup to select the items. That is a very great thing because it gives the user more space especially for the diff view (another great feature). But: I want this sidebar to stay hidden, but always when I close MacHG and open it again (or only close the window) the sidebar is visible again. I would like if MacHG stores whether this sidebar was visible or not.
BTW: Why are your popups not transparent as the ones of Apple (e.g. in Calendar)? I think that looks nice.
BTW II: I think that is not a problem of the new 1.0 Beta (also exists in the stable 0.9): do you know where the sheet open animation for customizing the toolbar is not working? (the close animation works fine)