The autorun option simply allows you to open the contents on a disc with an associated application. If the CD can be accessed and its content copied, then it means it has problems closing the session. It's not a problem but there could be DVD/CD drives that will have problems reading the CD. Try to change the disc and burn it again and see what is its behavior. If the error persists, switch the burning application to an alternative. There are plenty of them available.
