Ugh... I was hoping this wouldn't turn in to this big of a problem. I've got the same thing here, VS980 after flashing a Cloudy ROM.
I took over a thread here recently http://forum.xda-developers.com/show...php?p=52858791
, but I'll post here again anyways. I wonder if it's the same spot with you guys too. It's right where the install button is on the Play Store, right? For a few hours after it started it went back to normal, then messed up again permanently.
TOT'ing back to 12B didn't help, so I got a replacement device from Verizon. I've yet to send back my old one because I'm worried about the unrooted flag in the bootloader and settings.
I don't have enough posts yet to be able to do this, but can someone alert a dev about this? Particularly in the thread of whatever ROM it was that you last used? A lot of people in the last thread said it came from Cloudy, and I figured it might make sense as Knock Code was supposed to be a feature on there even though the VS980 source wasn't out. Then again I probably have no idea what I'm talking about, but I'd love to hear from someone who does.