It’s a bug in Seas0nPass. In Mac OS X 10.7 and up, tar changed its behavior not to follow symlinks when restoring files. Ironically, it is the same bug evasi0n exploits in iOS MobileBackup to make the jailbreak untethered.
See my previous post: http://forum.firecore.com/topic/9529?page=5#comment-58597
You can download the modified evasi0n.tgz from https://dl.dropbox.com/u/72403274/evasi0n.tgz to solve the problem. Replace your Seas0nPass.app/Contents/Resources/bundles/AppleTV2,1_5.2_10B144b.bundle/evasi0n.tgz with this file and post here the result.