I have an iPod touch 16 gb jailbroke 1.1.2... I was on Wifi the other day and it all froze up so I shut it down and turned it back on... But it did not open to the main page.. It opened to a screen that looked like a dos prompt or the iphuc program. It said a bunch of stuff but. At the top it said that the root device was in read only mode... I couldn't do anything so I restored it and rejailbroke it.. What could have caused this to happen? A virus? Something I dl from installer?