hello! About the updates ios 5.0 and 5.1 I noticed some strangeness on my iPad: from some days can not stream certain types of movies. I'm sure this depends on some error in the firmware of the iPad, which also has other minor problems. So I decided to restore the ios, or at least upgrade from version 5.0.1 to 5.1. I have a ipad 2 32 gb gsm, with jailbreak. I followed all the methods listed in the forum: I used redsn0w, tiny umbrella and itunes, but there is always a mistake. Checking between the various info and preference, I discovered that there is a mismatch between the version of my ios (5.1) and the reference number (9A405). I saved my SHSH from version 5.0. I want to update / restore my iPad 2 without losing the jailbreak. Any suggestions? Did you ever hear anything like that?