Just curious, are apple repairing all units.. or only those showing signs. I gather there is a tester for it, wondering if they test on devices working as planned. I had sent my mbp in due to something (I really can't remember why) and they replaced the mainboard.. so I am curious if this could still be an issue, or if it was rectified. Can we see all repairs based on serial? If so, anyone know where? Cheers for the info!