Anyone having an issue where the lockscreen disappears (ie when you unlock the phone it goes straight to the homescreen). I can't get the lockscreen back whatever I do. Also, the home button is not working. And when I hold down the power button, I only have two options - Power Off and Reboot. This has happened twice and only on the latest version. The first time it happened I did a full re-install (flash, wipe etc). It has now happened again. Anyone any ideas?