No audio playback of MPEG-2 muxed program streams made with Compressor?

Is anyone else experiencing this?
Any fix? Audio plays in VLC so its not operator error..
Upgraded to QT 7.6.6 (1632) and no longer No have audio playback of MPEG-2 muxed program streams made with Compressor?
This machine played audio out of QT with these files prior to upgrade this afternoon.

I've never run a component conflict test is there a tool for that or is this a command in terminal?
There may still be some "tools" around to help with the process but you still have to run playback tests yourself and evaluate the results. The process is quite simple. You just need to "hide" one or more components, open the QT Player, and play a file to see if it is now working correctly. If it isn't, then continue "hiding" additional components. If the file does play correctly, then you have found a conflict and can start "unhiding" components to determine which one (or combination of components) is causing the problem by removing any "problem" components to an external location such as your desktop. Just remember to close the QT Player after each playback test. This is required (or at least used to be required) for the regeneration a new list of components available for use.
I used the term "hide" above since I simply keep a "Disable" folder handy in my Library QT Component folder for just such tests. Placing a component or set of components into the folder temporarily "hides" it from the QT Player when it next generates a list of the components available for use. Specific strategies vary. I sometimes use use a binary tree approach to hide the components (I.e., "hide" half of the components instead of one at a time.) Unfortunately, I don't know exactly how this works with regard to QT X. So, I would likely run such tests in the QT 7 Player. So far, when everything is working correctly in QT 7 Player, QT X seems to be able to play the same file(s) in QT X via the 32-bit switching process.

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