Last night I attempt to update my 5.1.1 jailbroken iPod touch 4th gen 32gb. I didn't think about it at the time and just hit 'update software' in setting. *facepalm* Then after it updated it just continued to do a boot loop where it will show the apple for a few seconds, then go black, then back to the apple symbol, and then black. I've tried the hard reset (top and home button for 10 sec.) and booting into safe mode (holding up volume button) but neither have worked!! Help!!!