I'm having the same problem. I'm using Adobe AfterEffects 6.5 and exporting to "DV/DVCPRO - NTSC". The image quality is absolutely terrible - it's impossible to read text and make out details.
Does anyone remember what format we had to render to last year? If we can't find an acceptable solution I'm considering uploading 2 - one crappy one that meets their expectations, and a second using a different (though just as common) codec that looks decent. I'll experiment a little more with the export function to see if I can get it looking OK and let you guys know the results.
Good luck
