Strangest thing. When I create a folder on my MBA (Mountain Lion), and then go to open it, I can't. I click on the new folder, but nothing happens. The name of the folder gets highlighted, like it is selected, but the Finder window doesn't change. Then when I go to open any other folder there, same thing happens, the name of the folder gets highlighted (but the new folder's name also remains highlighted) and nothing happens. I can't even delete the new folder until I go somewhere else using the Finder sidebar. So I go somewhere else (user or applications), then come back to the place I created the new folder, and then I can delete it. Really weird. My iMac, also running 10.8 does not have this problem. Any ideas?