http://www.macrumors.com/2008/09/09/apple-releases-quicktime-7-5-5/
Apple also released QuickTime 7.5.5 today and is recommended for use with iTunes 8:
Apple also released QuickTime 7.5.5 today and is recommended for use with iTunes 8:
QuickTime 7.5.5 includes changes that increase reliability, improve application compatibility and enhance security.
This release is recommended for all QuickTime 7 users.