Apple recently sent out iOS 6.1.3 beta 2 to testors recently. Yesterday, @planetbeing (evad3rds team leader) announced that this iOS version DOES close off one of the 5 exploits used to Jailbreak iOS 6.0 thru 6.1.2. So....
WHEN iOS 6.1.3 IS RELEASED TO THE GENERAL PUBLIC.... DO NOT UPDATE IF YOU WISH TO KEEP YOUR JAILBREAK!!
WHEN iOS 6.1.3 IS RELEASED TO THE GENERAL PUBLIC.... DO NOT UPDATE IF YOU WISH TO KEEP YOUR JAILBREAK!!