I recieved an iPad this Christmas and had it tethered jailbroken on 4.2.1 using resn0w. There was an app on Cydia that looked interesting and that seemed to put the iPhone apps cleaner called RetinaPad. I installed it but after Cydia asked me to reboot the iPad is stuck on the start screen, just showing black with the Apple in the center. If I force restart (top button and home button) it simply turns off for a moment and goes back to the same. Connecting to the computer doesn't do anything. Anyone have any idea how to solve this? It would be much apreciated!