I am just gonna copy and paste the announcement I received from www.imagineproducts.com. I believe it says it all:

“Problems Running MOV files in QT 7.3?

In recent weeks many Final Cut Pro and Macintosh users have experienced problems playing back certain QuickTime files after upgrading to QT 7.3.

Imagine Products has worked hard to create a “repair” utility for existing MOV files (regardless of origin) to make them usable with all QT 7.0 – 7.3 versions.

This repair utility is designed specifically to modify QuickTime (MOV) files created with earlier versions of QuickTime that will no longer play in QT 7.3. It resets a binary null value for the Color Look Up Table (CLUT)–but only if appropriate.

The utility will not damage or alter files that are already compatible with QT 7.3.

The Fix:

You may download a free demo of the QT 7.3 Fixer. It will repair one file at a time allowing you to assess whether the utility will help with your MOV files.

The Multi-file QT 7.3 Fixer allows selection of entire folders of MOV files for batch processing. Or, you may select just a single movie file for processing.

You may purchase the QT 7.3 Multiple File Repair tool for a modest $29.00 from our web store.

NOTE: This software REQUIRES QuickTime 7.3 to function. It is Universal binary, PPC and IntelMac compatible. OSX 10.4 – 10.5.

Alternatives to modifying the existing MOV files would be to stay at (or roll back to) QuickTime 7.2; await a patch from Apple (if one is coming); or re-output QT files from MXFs using updated P2 Log, HD Log, or similar applications.

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Please note this problem has been resolved in all our Macintosh applications including: P2 Log, P2 Log Pro and HD Log applications and demos.

If you have not done so, please download fresh versions of these applications from our web site: www.imagineproducts.com

New versions of all our Panasonic P2 compatible applications are fully compatible with QT 7.0 – 7.3 and with all versions of OSX 10.4 & 10.5 (Leopard), PPC and IntelMacs.

Sincerely,

The Imagine Products, Inc. Team

P2 Log™, P2Log Pro™, HD Log™ and Mac Digital Clip Library are trademarks of Imagine Products, Inc. All other trademarks are property of their respective owners.”