So in Mountain Lion different file types get sorted into groups (devided by lines) if you click on "sort by"...that's new. What really annoys me though is another change...when you have a lot of subfolders among other file types for example in a folder and click on 'sort by file type', not all subfolders get displayed. If you want to see all subfolders you have to click on the button in the upper right corner. So if you do that and click on a subfolder, and then go back to the main folder, you have to click on the button in the upper right corner AGAIN in order to view all subfolders. How is that an improvement???