On friday, my 0827 -current kernel died with a panic: bad dir, and
I let it do sync, which failed (syncing disks... 1 1 1 1 1 1 1 [etc]),
after which it said that it was doing a kernel dump, and then rebooted.
Afterwards, the superblock on the root partition was gone, and after I
got the system booted from another disk, most of the root partition turned
out to be screwed, and some damage to the bigger home partition according
to fsck. I re-mkfs'ed the root partition because it was causing panics 
even after fsck said there was nothing wrong with it, and after I got 
things reinstalled onto it, the system had developed the following problems:

 - both login and su don't prompt for password. After entering a username
for an account with a password at the login:-prompt, it just says 'Login
incorrect' without a password-prompt. su just says 'Sorry'. I've replaced 
my libs, my login binary, my su binary, my getty, my init, my gettytab 
and rebuilt the password dbs and tried a few kernels, but to no avail, 
the same thing still happens. I'm on console, neither getpwuid() nor
getpass() had any problems in test programs. The terminal type is set
to vt220.

 - serial ports don't work anymore. When I boot to single-user, they work
for some time, but then they suddenly stop (before ttyflags is ran, the
modem has its rts/cts lights on while booting and in single-user. They
also turn off). Trying to cu -l /dev/tty00 -s 9600 says 'Connected',
but nothing is getting to the modem, and exiting cu gets it stuck in
'exiting' state in ttyout.

 This is NetBSD/mac68k, and before the crash I had it setup pretty much
similarly, and I'd never seen these problems. The same kernel had been
running most of the time since 0827.

(I sent a mail to port-mac68k on friday, but it looks like the 
weekend-long network outage got it)

--
'Good-bye and hello, as always'