Since the YOSEMITE upgrade, every time I ran PERMISSION REPAIRS, I would get only one message: repairing the USER/GROUP numbers in the aforementioned folder.
That type of permission error has been present in almost every OS X upgrade and update. Apple's advice is to ignore them. The only time you need to repair permissions is when something is actually broken.
If we knew what it was we were doing, it wouldn't be called research, would it?
