I had a drive go bad, and I've had to migrate my applications over to a new drive with 10.8 previously installed. At some point my Quicktime previews started to fail in the Finder. I immediately reinstalled 10.8 from the App Store, and only HALF my movie files would preview and or play. I've removed all the codecs and reinstalled iTunes, which put them all back, and I've updated my permissions a number of times, which did complain about the codec files ONCE. Now there are no errors, but Quicktime is none the wiser / functional. Back in the day the installer for Quicktime used to be very easy to download and install. Apple has since prevented the removal of the Player from your Applications folder, and has no direct or indirect link to reinstall it. Given that reinstalling the entire system failed to solve the problem. What would one suggest to a chap in my position? Thank you in advance.