Error: "user supplied User-Password does NOT match local User-Password" even though they do.

Hello, I've been using FreeRadius for quite some time now, but after a recent update (to 2.0.4, debian lenny variant) all users in a certain group have stopped authenticating properly, with the above error -- even though as far as I can tell the password transmitted (and logged) is identical to the one in the database. I've attached a sample of the logfile, with names and passwords slightly edited but otherwise accurate: I've tried everything I could think of, including deleting the user and entering the data anew by hand, but the error persists. Any suggestions to dig further and help me find what I may have missed would be welcome. Regards, -- Rens Houben <shadur@systemec.nl>