A new iMac running 10.8.2 has this glitch which is more of an inconvenience than a problem. Take a look: Notice how the far right "Images" (circled red) looks like a folder, but it's actually one of Finder's headings, just like the headings to the left (like PDF Documents and Folders). Sometimes I'm tricked thinking it is a folder but when I try to click it, nothing happens. Not the end of the world, but a pain in the neck to deal with. If I change Finder view from Column to List and back to Column, it will self correct. Is this a known bug? Is there a fix?