When you've downloaded certain things or hacks or whatever through Cydia, they all have different buttons at the bottom when you're done. Some say return to Cydia, some say restart springboard, and some say reboot device. Whenever I've downloaded something and have to press reboot device, my iPod touch shuts down, and the only way I can get it working again is to re-jailbreak it. Am I doing something wrong? Can anyone help me with this?