To test a bit, I took a -current snapshot from releng (the one in the
20020711 directory), and I noticed that it reports

"illegal instruction" 

on my IIci, when exiting fsck. (both when I fs'ed manually in single user
mode, as when after an "exit" it booted to multiuser mode)

When booting to multi user mode it also screams: "Unknown error; Help!" just
after that "illegal instruction" msg.

(and ifconfiguring my Daynaport E/II still hangs the system).