I was beginning to think I'm the only one. :roll eyes:
I did notice however, this happens most of the time when saving something to the downloads folder. In my case it usually is depicted as a not complete progress-bar, even if the download has finished. Moving the file doesn't help. I had to restart every time to fix it.
How do I restart the dock separately?
Another thing: When you don't restart soon after that happens, the system tends to get unstable and when restarting the Finder seems to hang for a long time.
Hope this gets fixed soon.