This is not a huge deal, but for users accustomed to finding the little icons for minimizing, maximizing and closing the window at the top right, look again. Ubuntu decided to put them at the top left. It is possible to fix this with a free program called Unity Tweaks. I installed it and was able to move the buttons to the top right, but when windows were maximized to take up the whole screen, they'd move back to the top left again. This is annoying, and difficult to get used to, especially if you switch back and forth between Linux and Windows computers on a regular basis.