Well, i have a 3GS on 3.1.2 jailbroken via blackra1n.

I got ibooks for from the app store, and because it was for FW 3.2 i used a plist editor to change the minOS. It installed just fine, but when i go to open it on the device it automatically restarts my device. Is this a known issue, and is there a fix besides updating my device.