I have problem JB my device (iPad 2 WiFi).
It always stuck on Configuring System (2/2) for ever!!!
I followed the instructions letter by letter. Is NOT my first JB ever made for my iPad. I have done this at least 6 times in previous versions.
I was on iOS 6.1. I went to iOS 7.0.4 through iTunes and then i make a set up as new.
I removed passcode and i make iPad never sleeps to see what happening in the screen.
I tried even to factory default again through iPad in case something went wrong but it stucks there anyways.
PS (i even tried to switch usb ports in case that matters)