tom1957 who has gotten miui almost 99% debugged...will post it tomorrow when I have upload time...and who has helped figure out green tint on most roms says he thinks the nfc apk is most likely the culprit. Did not go in to details on it but I definitely trust his hunch concerning it. Might be worth deleteing the apk to see if you notice a change. Also got another tom special...i think....called gummy cm11 to upload along with miui.