SunOS 5.8 kernel panic

I have an E450 (4 CPUs, 4GB RAM) running Solaris 8. Yesterday I applied the
8_Recommended patch bundle. This morning I rebooted but the kernel panics thus:

SunOS Rel 5.8 Version Generic_108528-23 64-bit
panic[cpu0]/thread=10408000:
mod_hold_stub: couldn't load stub module sched/TS_DPTBL
000000001-4-6ed0 genunix: mod_hold_stub+1a8 (1, 2050, 10412, ... etc, etc

Any recommendations on how to get this machine up and running?
--
Ian Grant, Computer Lab., William Gates Building, JJ Thomson Ave., Cambridge
Phone: +44 1223 334420

[581 byte] By [CodeProf.com] at [2007-12-25 1:49:00]