OK, this time it was a kernel illegal instruction trap (in 1.3beta).
trap type 0x2, code 0x0, v 0x0

Same traceback as far as subroutine names goes.

Signature failed Preliminary Design Review.
Feasibility of a new signature is currently being evaluated.
h.b.hotz@jpl.nasa.gov, or hbhotz@oxy.edu