So there I am..untarring something on my system and the next thing I know 
I see something about valloc() and I am in the debugger with a nice db> 
prompt...

So I reboot, it goes through until it gets to filesystem check and has a 
big problem with my /usr partition, and tells me all about DUP BLKS and 
here I am now looking at removing things with messages like

DUP/BAD  I=75522 OWNER=bin MODE=100555
SIZE=1515 MTIME=Mar 30 20:23 1999
FILE=/sbin/ndc

So what the heck is this about and how bad did I just hose my system?  It 
_appears_ to be running fine so far, other than sysctl, and a bunch of 
other errors at startup...

Arrrrrrrrrgh...where do I go from here? re-install?