I searched and I don't think this has been covered. I'm running iPhone 4 on 4.1 via AT&T. I jailbroke a while ago using GP. I've had almost zero issues except for today. Last night I updated to the new version of iBooks on my iPhone. I didn't mess around with it until right now. When I go into iBooks and try and open a purchased book it gives me an error saying: "There is a problem with the configuration of your iPhone. Please restore with iTunes and reinstall iBooks." Has anyone else encountered this issue? I uninstalled iBooks and reinstalled OTA and I'm still getting the same issue. I really don't want to reinstall the OS and everything, in fact I won't. Is there any chance I can save my books and still read them? Any work arounds? Thanks!