Kiosk crashing iOS7

Question

I have updated my iPad(4) to iOS7.
Now when I touch the Kiosk icon at the left top,
My iPad chrashes and I get the Apple logo on my screen.
After a while, the iPad will be in the sleeping mode
and I have to unlock it again.
When I tap the Kiosk icon at the right bottom, it gives no problems.

Answer 1

Just adding a "me too", though in my case a new iPad Mini (retina) and actually an Apple Wireless Keyboard (brand new: i killed my old 1st gen one by leaving it on a shelf for months with batteries in it until I got the iPad and discovered my error). So no third-party keyboard firmware excuses. :-D
As others have reported; for me it seems that occasionally (not every time or it would be unusable) on waking the keyboard after it goes to sleep, the iPad crashes, completely unresponsive to anything short of a hard reset (power+home held down until it turns off, then turn on normally). (Side note: Not *quite* unresponsive: First time it happened I plugged it into a mac and it let me take a backup and sync, while the screen and buttons remained unresponsive; so I think the computer in the iPad's fine, just its primary IO device locks up.)
One thing: I *also* have the iPad paired to a Logitech Ultrathin Keyboard Cover. (First question: by any chance anyone else having this paired with more than one keyboard, even if only one is active at a time? In my case, the Apple one's for home, for full-speed typing; the Logitech one goes everywhere with the iPad.)
I haven't seen this issue happen with the Logitech. Or I *might* have seen it once; maybe early when I wasn't looking for the pattern so my memory's unreliable there. But it happens a lot with the Apple keyboard. One simple thought there is that the Apple keyboard has quite a short timeout before it goes into powersave (side-question: anyone know how to make it longer on an iPad?) so if the problem occurs on reconnection/wake-up, it's simply more *likely* to happen on a more narcoleptic keyboard.