The system no longer accepts setting a specific color profile. When I select a color profile OS X instantly adjusts the screen and displays it correctly, but after half a second or so it falls back to the default profile.
It has never been like this before.
Setup: MacBookPro5,3 OS X 10.6.8 and Cinema Display 23" (the old one with matte screen and DVI connector).
Note: I have resetted NVRAM and PRAM and ColorSync Utility -> Profile First Aid -> Repair. But that didn't change anything.
Thanks for your efforts and hints. Prior to your reply I found this help: http://reviews.cnet.com/8301-13727_7-57540493-263/how-to-make-colorsync-profiles -stick-in-os-x/
And it worked.
open $(getconf DARWIN_USER_CACHE_DIR)
Show your user id (UID) with: id username.
Note: don't change color profile directly, log out and in first.
So I can't confirm if deleting