After installing QuickTime 5 Public Preview and restarting the computer, you see an alert box with the error: "Some of your QuickTime components failed to load because they are out of date."
If you accept the option to try to update the software again, the update fails and the error appears again the next time you restart the computer.
Solution
2. Choose the Custom option to uninstall QuickTime 5 Public Preview.
3. Reinstall QuickTime 5 Public Preview.