For the past few weeks my icons have been acting weird. (See attachments) They seem to go like this randomly but sometimes the icon is as it should be in the dock but not in the apps folder and vice versa. Today, most icons have changed but when it happened before it was only 10 - 15. When I noticed it just a few minutes ago, Finder locked up on me twice. Would that have anything to do with it? Disk utility shows SMART status as verified, no faults with the drive. Can't seem to find anything here or on the Apple support section. As I've been typing this, I had Finder lock up again and all of a sudden things are back to normal ... I think my Mac has a gremlin! Any ideas why this is happening?