Previously the Options -> Login Log screen would show logins that were authenticated correctly (eg correct username and password) but were not authorised correctly (eg attempt to do a POP login as a guest, or when account has been suspended) as a "Success" rather than a "Failed" login. This has been changed so that now logins that have the correct authentication details, but are still blocked due to other reasons are logged as failed logins. The Details column will also have additional information about why the login failed.