Thanks Larry for responding, but....

> Perhaps ftp.netbsd.org had some problems that have been corrected,
> or a network error corrupted the files in transit.  Try downloading
> the files again, or try using a different server such as
> <ftp://ftp.macbsd.com/pub/NetBSD/eskimo.copy/tarballs/>.

  I am afraid the ftp transfer is NOT the problem.
I have another SunOS machine sitting next to the NetBSD-Mac68k.
NFS server is running on it. I have ftped files from 
ftp.iij.ad.jp:/pub/NetBSD/NetBSD-mac68k/binaries/ to that Sun
machine. At installation, I did mount that server and directly
run tar zxvf command on NetBSD (mac68k-1.3Beta) for base,etc, kern.
Up to this point, it was totally fine.

 After rebooted for 1.3_RELEASE machine, I did the similar thing
to add xserver.tgz etc. At this time, I had the problem, say,

SunOS NFS server -> tar zxvf on NetBSD-1.3_RELEASE machine.

I was suspicious the pipe on gzip and tar at NetBSD_RELEASE,
but just gunzip on xserver.tgz has a problem ( I have copied the
file and did gunzip also).

Then I did gunzip on SunOS (NFS server) and do tar xvf on NetBSD,
it is OK. I have installed xcontrib and xfont successfully.
The tar files had no problem at all.

That is the story I am suspicious with gunzip on MacII ci.

Thanks for reading,
---
Makoto Fujiwara
Chiba Japan
MacIIci 20MB, Portrait display (+video card), 360MBytes Disk
Ethernet A-Series