What this means is they are most likely patching the jailbreak that was just released. Do not update to this if you plan on jailbreaking in the future. Also if you haven't already upgraded to 6.1 now would be the time to do it.
Obviously if you are already jailbroken DO NOT UPGRADE TO 6.1.1
Yeah. I believe this patch addresses somes problems with the iPhone in Japan and Asia. The Maps app specifically.
But once you have a JB on yours, do what the Cat advises: Stay away from updates from Apple from now on! It won´t be long before iOS 7 is available. Time flies.
Well so far the 6.1.1 Beta doesn't patch the JB. Keep in mind that it is still Beta and could change before it's released. Even if they don't patch it don't upgrade to it for Evasi0n doesn't support it at this time.