OK this is ONLY confirmed on iPhone 4 but I suspect the results would be the same on iPod Touch 4 Jailbroken with either jailbreak results are the same. With Background installed: Close phone app in app switcher. Push sleep button and wait 2 minutes. Now attempt to facetime the iPhone 4 from an Ipod Touch OR FT app for Mac Beta. The phone will not ring. Somehow backgrounder messes up the push in facetime. ** It will still push from iphone to iphone AND if the app is open in appswitcher. without Backgrounder installed: The issue goes away and FT push is restored. If you test other combinations such as ipod to ipod, ect please post to add to the info.