QuickTime 6.3: Installs on Top of Mac OS X Systems With Later Versions of QuickTime

The QuickTime 6.3 installer for Mac OS X does not warn you that you are installing on top of a later version of QuickTime.
If you accidentally installed QuickTime 6.3 on top of a later version (including QuickTime 6.4 or 6.5), download and install the later version again. It's available from the QuickTime Download webpage (http://www.apple.com/quicktime/download).

This document will be updated when additional information is available.
Published Date: Feb 18, 2012