I keep encountering what's shown in the photo. Also, when this happens and I try to open a folder, no files show up, and the loading icon on the bottom right of window just keeps moving. I've already tried restarting, verifying and repairing with Disk Utility, and doing a clean install - none has solved the problem. It doesn't happen too frequently, but when it does, I always have to restart to fix it. Anyone else experiencing this?