When I am using Dropbox in my browser, every time I delete a file or folder I get a little black bar popup notification that tells me I just deleted a file or folder. But I already know that. I have to click Close to get rid of it. I know it goes away, but I never want to see it in the first place. The option to Undo could be handy, but couldn't it be something less annoying than a popup (distracting, and blocks the view of whatever is beneath it)?