Two identical mov files but Quicktime fails to open one of them

I checked the files are identical with 'cmp' in Terminal:

Jaspers-iMac:LaCie weeklycantata$ cmp /Volumes/LaCie/Andere\ foto\'s\ en\ films/2002\ Olaf/2002-Q3/Beach.mov Test\ restore/JaspersiMac/Beach.mov

Jaspers-iMac:LaCie weeklycantata$

Also the permissions are identical:

Jaspers-iMac:LaCie weeklycantata$ ls -al /Volumes/LaCie/Andere\ foto\'s\ en\ films/2002\ Olaf/2002-Q3/Beach.mov Test\ restore/JaspersiMac/Beach.mov

-rwxr-xr-x@ 1 weeklycantata wheel 36442644 Oct 6 2002 /Volumes/LaCie/Andere foto's en films/2002 Olaf/2002-Q3/Beach.mov

-rwxr-xr-x@ 1 weeklycantata wheel 36442644 Oct 6 2002 Test restore/JaspersiMac/Beach.mov

Using command-I in Finder, I can see the sizes are identical but the "More Info:" section is much more elaborate. First a screenshot of the info on the file that does play:

Note less "more info" on the one that doesn't play:

The error message on the one that doesn't play:

What's up with this? Is there some secret registry of meta-data (where the "more info" would come from) hiding somewhere else in OS X?

Thanks,

Jasper