We are having some problems with authentication this evening on the 56k dial-up service. Earlier, around 5:00pm pacific time, the password database in the authentication server got corrupted. That was fixed by about 6pm, but then around 7:30pm it started failing to authenticate again. I changed one password and then all of the passwords that were failing started authenticating again. I don't know what caused this or why changing one password fixed it. There may have been some intermittant networking problem affecting communications to the authentication server but since it's not presently in a failed state I can't determine where.