I have a dev user who is running queries to bugzilla via .NET code, and after updating his connector gets the error "Authentication with old password no longer supported, use 4.1 style passwords." I tried recreating the same password again for his user with no luck. I have several other users that connect and do not want to impact them. Server version: 5.1.67 Source distribution
I had recently migrated from the old server to a new server, New OS and mysql install. I moved the DBs over using dumps and I added most of the users by using show grants on the old box and copying the output to the new (I am not a mysql guru, obviously).
He is using a username@'%' account if it matters.