They do it this way, as they can't patch it in the release of the FW. So you've always got a working jailbreak, just don't upgrade to the latest versionI think the way these guys work with the releases is they purposely only publically release to older versions of the PS firmware as it helps to keep Sony off there back. If they are releasing jailbreaks for the latest current firmware, then Sony would be more proactive to track them down to pursue legal action. Not saying Sony wouldn't be doing this anyway but it's more of a threat to Sony as it backs them more in too a corner.