I have had my iPhone 4S passcode lock set to engage 'after 4 hours'. Today, every time I went to look at my phone, the passcode prompt came up. Finally went into settings to see if I accidentally changed something and noticed a couple of problems. 1. "Turn Passcode Off" is grayed out. Obviously meaning I now don't even have the option to NOT have a passcode to unlock. 2. "Require Passcode" submenu only gives the options of immediately; after 1 minute; after 5 minutes. Anyone else seeing this issue? It's not a 5.1 issue, as I've had 5.1 since it released and this problem just popped up today. Pretty much lost as to why this is happening.