I've found that every once in a while a user cannot change their password through the Drupal account form. If you change their password you get the standard success message, but when you try to login with the new password you get the unrecognized name/password error.
If I go into the LDap server with something like JXplorer and change the password manually in there, the problem goes away.
This doesn't happen with all users, but it is an issue that occasionally pops up and is quite annoying for the clients. Can anyone tell me what would be causing this?