This time the problem seems to be with the DesktopVideoOut component. Have him try moving /Library/QuickTime/DesktopVideoOut.component out of /Library/QuickTime and launch Diablo 3. Also, ask him if there are any messages in the system Console. I'm not sure where the DesktopVideoOut component is coming from (I'm guessing it is from Final Cut again). I want to try to reproduce the issue in house as well so we can raise the issue with Apple. Can you ask him which version of Final Cut he has on his system? Was this the first version of Final Cut he installed or did he have older version prior to the current version that is installed. Removing these plugins and components are not really a solid solution so we should still try to get to the bottom of the issue. Thanks.
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