This is what I did to work around this problem exporting from Final Cut Pro via compressor to make H264 clips from HDV footage. Export sequence using Quicktime conversion from FCP, format is Quicktime movie, video settings remaining on HDV as per the sequence, ‘auto’ data rate. Select ‘options’, ‘filter’, ‘adjustments’, source profile set to Adobe RGB, destination profile set to sRGB IEC6966, matching option left on ‘perceptual’. I then imported the clip into compressor and used the HD-DVD setting to make the H264 clip. I used to have the same problem with photoshop and getting washed out colour shifts when exporting pictures for the internet. The same kind of colour space conversion seems to have done the trick for me in video land.