> I'm still having these hangs.  I have another clue.  Out of 3 machines
> running NetBSD 1.3, this is the only one using union mounts.  Is it
> possible that the union mount code is getting messed up and jamming
> the system?

It's not unconceivable.  From what I've understood of earlier
discussions it's suceptible to crash/hang if you modify the file
system underlying the mount while it's being accessed "from above";
there are apparently VFS locking bugs in this area.

- H=E5vard