Existing users, 
QuickTime 7.1 delivers numerous important bug fixes and addresses critical security issues. This update is highly recommended for all QuickTime 7 users.
Important Notice to QuickTime Pro Users
Installation of QuickTime 7 will disable the QuickTime Pro functionality in prior versions of QuickTime, such as QuickTime 5 or QuickTime 6. If you proceed with this installation, you must purchase a new QuickTime 7 Pro key to regain QuickTime Pro functionality. After installation, visit www.apple.com/quicktime to purchase a QuickTime 7 Pro key.
Apple QuickTime
Multimedia player & authoring system.
Version: 7.6.2
Prior Pro Users Beware - See Warning below
Feedback Type: Review
Contributed by: macattorney Thursday, May 11 2006 @ 01:31 PM PDT
Product Platform: MacOSX
Used Product For: Less than a month
Recommend Product: YES
Comments
Prior Pro Users Beware - See Warning below - balancedview
No difference from any of the 7.0.x updates of QT.It has been this way with each of the full number upgrades of QuickTime.
QuickTime 5 Pro key did not work for QT ver 6, needed to repurchase Pro key.
QuickTime 6 Pro key does not work for QT ver 7, need to repurchase Pro key for full pro functionality.
So this has been true of all the QT 7.0.x updates, and still same for 7.1.x etc.
I think Apple has gotten more forthcoming about warning of this because there were a lot more complaints from people who thought their ver 6 Pro key should work when they upgraded QT to version 7.x.x .
(Ok, me too, I'd hope that you wouldn't have to 'rebuy' Pro each version number upgrade... but I'm not belaboring that point in this post now.)
Thursday, May 11 2006 @ 07:48 PM PDT
Prior Pro Users Beware - See Warning below - ctuur
For all clarity: the QT 7 Pro key I bought for version 7.0 still works fine with QT 7.1.Friday, May 12 2006 @ 12:45 AM PDT
Prior Pro Users Beware - See Warning below - Swift2
That's been true since 7.0. What's the difference?Reply to This
Thursday, May 11 2006 @ 01:57 PM PDT