Update: This problem seems to be a function of ns_param EncryptPasswordsInDBP.
Running in debug mode showed this error occurring right after:
[20/Aug/2000:06:58:06][755.4101][-conn0-] Notice: Querying '
select password
from users
where user_id = 10
and user_state = 'authorized';'
[20/Aug/2000:06:58:06][755.4101][-conn0-] Notice: nsd.db: sql(localhost::myhost):
select password
from users
where user_id = 10
and user_state = 'authorized'
I had been using encrypted passwords, so I reset EncryptPasswordsInDBP to 0; I was then able to successfully log in. More surprising was that upon resetting EncryptPasswordsInDBP to 1 and restarting, I was _still_ able to log in -- everything seemed back to normal.
Initial guess is that this is a function of interaction between the stored username/password combination in the OpenACS database and that stored in Internet Explorer 5.0.
Worth a trouble ticket?