Default [Q] "Wrong Password" on lock screen all of a sudden... fix?

I went to unlock my phone (which is currently running Darky 9.2 and a PIN code screen) and I typed in my correct password and keep getting "Wrong Password, try again." Is this a known issue or is there even a fix for it other than factory restore? It's a bit of a PITA, since this happened about a month ago and I had to restore it then...
Current
Nexus 4: Stock
Nexus 7: Paranoid Android

Retired
HTC One XL
Kindle Fire
HTC Inspire 4G
Samsung Captivate
iPhone 3GS
Samsung Blackjack 2