Originally Posted by GoSharks
Or upgrade to 5.3.4 or 5.3.5, just NOT 5.3.3...
It might be possible to learn why 5.3.3 doesn't jailbreak and 5.3.4 does:
From file sizes, 5.3.3 is a complete system image and 5.3.4 (which restores our jailbreak access) is a bs difference.
So the change has already been isolated for us by lab126.
bsdiff and bspatch have publicly available sources:
Which should contain all the information about the patch file format, in case lab126 forgot to document something.