One thing that won't show up in screenshots is the UI interaction. On my Mac, the tools on the bottom and right edges can't keep up when resizing the window.

One thing that won't show up in screenshots is the UI interaction. On my Mac, the tools on the bottom and right edges can't keep up when resizing the window. Sometimes it's a fraction of a second lag as I drag, sometimes it simply doesn't update until I let go of the mouse. I know we're a grumpy lot here at HN, but I'd expect better than this even if it were a web app.