I've heard that some of the production studio was in such a rush to launch BluRay Disc,
so the quality of the movies don't reach BluRay quality.
Pixar always makes good ones though
Fry's has a group of $6.99 or similar BRs - you can be sure these were the equivalent of the scrap off the cutting room floor, from a grade F production.
Diaster Movie.....well Metacritic gives at a 15 out of 100 score, and the people gave it a 1.3 out of 10. That puts it almost as the worst movie ever rated by them. Then again, they don't rate for DVD qualitities....pick your poison.