@geekmaster: Won't help, the (main) rootfs is wiped during the 5.3.0 update.
(Unless my memory's shaky and you can use it on a vanilla device, without ENABLE_DIAGS support?)
EDIT: On a somewhat related note, one convoluted way to update to 5.3.0 for devs would be to boot to diags, flash the rootfs & kernel from the unpacked update, and manually reapply the jailbreak/usbnet on main. The entry point is plugged, but AFAICT, if we manage to put the stuff back in, most of the simple things should still work. If you mess up, you potentially only get one shot, though, ;D.
Last edited by NiLuJe; 11-07-2012 at 05:40 PM.