That little square in the bottom right corner of the screen in Windows 7. Why is that even there? It serves no purpose other than to screw up what you're working on - it's not an effective browser minimizer, it just momentarily brings up your main screen. Perhaps it does serve some purpose, but I sure as hell haven't found it yet. You can click on it to navigate to the desktop, but you can do that on the taskbar itself as well.
I'm trying to think of the thought process that went into making a small area of the taskbar essentially useless. Not only that, but if there's a way to get rid of it I haven't found it (although to be fair, I haven't really looked). It doesn't do anything that can't be accomplished just as easily by other means, and I honestly think they included it just to piss people off.
You know, standard Windows MO...
That is all.