I just downloaded the absolutely bleeding edge version of jemplode20.jar (2002-03-09 11:something Eastern) and tried to upgrade Hijack from 230 to the latest (235). It checked the versions, downloaded the kernel, uploaded it and - nothing, empeg stuck. After power cycling serial shows is stuck after 'Calling linux kernel...'. Obviously, the kernel got corrupted somewhere along the way

Ah, well, I didn't do old fashioned upgrade in a while....