I have been upgrading my DVD collection to Blu-Ray, and they are are USUALLY an improvement in picture quality and lossless audio. However, I was wondering from you members with big movie collections, are there any movies that are NOT an improvement on Blu-Ray, because of 'mastering errors', problems with color, cropping, aspect ratio, poor transfer, lossy audio, deleted scenes,incorrect subtitles, etc.? Also in the case of a movie that is in poor condition, like old B-movies, or movies shot on video , maybe the improvement in picture quality is negligible. Or if the DVD is considered an excellent transfer , and the Blu-Ray is basically the same transfer. Not as interested in which has better extras, mostly just the definitive versions of the Films.