I rooted my Galaxy S3, and got an update notice the other day. I tried updating it, and all was okay until it rebooted to try and install it. It booted to the Odin screen or whatever (the one where you select the Zip package when you root it), and then showed the Android robot dead with an exclamation mark over him. I tried restarting it to get it back to functionality, and fortunately this worked, but now it won't shut up about the update. Is there any way I can update it, or is it like jailbreaking an iPhone where you have to do it again (and only if there's a version of the jailbreak for your software version)?