I've been running 1.4.2 on a pentium pro box for about six months now.
it still seems to panic about once a week with a "lockmgr: locking
against myself" during the daily find jobs.  I've filed PR kern/10374
with all the details, including tracebacks from a debugging kernel.

since I haven't heard anything back from kern-bug-people, and since it's
not -current related, I figured I'd pester people here to take a look.

-- 
  Aaron J. Grier | "Not your ordinary poofy goof." | agrier@poofygoof.com