I found this on Macromedia's site
http://www.macromedia.com/support/fl...f4_digivid.htm
maybe this can help. It at least gives a workaround.
Macromedia Flash MX only:
What does this message mean, "The installed version of QuickTime does not have a handler for this type of Macromedia Flash movie"?
There is a Macromedia Flash Player 6 SWF track being published inside the QuickTime movie. The installed version of QuickTime does not support Macromedia Flash Player 6 (Flash MX can publish
QuickTime 5 containing a Flash 4 SWF track. See below for details.)
To resolve the issue change the Macromedia Flash version being published to version 5 or lower.
Note: If Macromedia Flash MX functionality such as embedded video is required, publish in SWF format for playback by Macromedia Flash Player instead of QuickTime.