A bug that could potentially corrupt your filesystems when using the
version of fsck_ffs post the lite-2 merge has been identified and
fixed.

If you have retrieved a copy of the sources for fsck_ffs since
September 16, 1997, please ensure that you update to the latest
copy.

The source you want has the following ident strings:
     $NetBSD: pass2.c,v 1.23 1997/09/21 03:51:34 lukem Exp $
(the important file is pass2.c, but I recommend that you ensure that
 the entire program is up to date...)

I apologise for the inconvenience.

[ The tarballs on ftp.netbsd.org will hopefully be regenerated tonight. ]