I've been having this problem on my iPhone as well. The problem occurs occasionally when I have a app launched (not a specific app, happens globally across all of my apps I've noticed). I will be using a app, it will freeze, and pressing the home button doesn't do anything. So I attempt to do a reboot by pressing down home and power at the same time. The iPad/iPhone will power off but it will not reboot. I have to just power on normally to get it back but does anyone have a idea as to why my iPhone and iPad freeze uP? On the iPad I have the following jb apps: winter board, font swap, backgrounder and fake carrier. On the iPhone I have the same apps but I also have pro switchers on the iPhone. Thanks in advance for your replies.