Understood: iPhone 4, upgrade from iOS 4 latest release to iOS 5 upon RTW. Corp Exchange Active Sync enforcing 6 digit passcode lock. Until yesterday, 10/23/2011, no issues. Discovered the following two situations: Randomly performing slide to unlock phone does not prompt for passcode iPhone in locked mode > hold down home butten until Voice Control is enabled > click on Cancel > slide to unlock iPhone > no prompt for passcode Passcode Lock is ON. When I go to General > Passcode Lock > prompted for passcode > type current passcode > done > Turn Passcode Off (grayed out due to Active Sync rule). Even after just typing in passcode, lock the phone > slide to unlock > still not prompted to enter passcode. Anyone else experience this behavior? What was secure in iOS 4 is no longer secure in iOS 5 on my configuration.