well, that is odd. When I click in your link it does shows that I'm downloading a 221MB file but, after it finishes, my mac shows that the file has 226.5MB (maybe something with the bit-byte conversion!). What is annoying is the fact that I know many people have made this downgrade already, but it does not seem to be working for me! Thanks for your help guys, I'll try the warranty and I'll let you know what happened.