facebook does a different thing. It does not allow any casing(sp?). It allows only the right and the reverse and first letter in uppercase. Blizzard seems to u

facebook does a different thing. It does not allow any casing(sp?). It allows only the right and the reverse and first letter in uppercase. Blizzard seems to uppercase the given password and hashes that. This method makes a lot of wrong passwords work. In facebooks case only two more passwords than the original are accepted.