Yesterday, I finally installed open source drivers on my Ubuntu 13.04, and I also installed Unity Tweak Tool. Today, I noticed that, when all windows of a program are minimised, it only shows a single little triangle, as opposed to having as many "triangles" as there are windows. For example, if I have two Chromium windows open, and I minimise one, it appears as if only window is open, until I either use my scroll wheel on the icon, or until I click the icon a few times. If I super+D to show desktop, everything shows up as only one window. This is a rather small thing but it's still a huge pain to deal with. Can I do something to fix this? Is there an option in the Unity Tweak Tool that I'm missing?