Originally Posted by Charles W. Hull
That's the strangest solution/work around I've ever heard of. But I've been having trouble with CS4 Media Encoder, and especially encoding Cineform; sure enough I created a new user account and this solved the problems.
This was a fleeting solution - the problem of CS4 Media Encoder not encoding Cineform came back. However the July 27 upgrade from Cineform seems to have fixed this problem.