clamav fails to unpack cvd files

[Dewey Hylton]

i've tried installing the port both via "make install" in the ports tree and via
portinstall - and on freebsd 4.8 and 5.2.1 - and get the same results any way i
try. works fine with default install on gentoo linux, so i know the software
itself works. here's what i'm seeing:

$ uname -a
FreeBSD bsdtest.fm.novanthealth.org 5.2.1-RELEASE FreeBSD 5.2.1-RELEASE #0: Mon
Feb 23 20:45:55 GMT 2004    
root at wv1u.btc.adaptec.com:/usr/obj/usr/src/sys/GENERIC  i386
$ pkg_info|grep clamav
clamav-0.75.1       Command line virus scanner written entirely in C
$ freshclam --datadir . --log freshclam.log
ClamAV update process started at Sun Sep 19 10:09:45 2004
Reading CVD header (main.cvd): OK
Downloading main.cvd [*]
main.cvd updated (version: 27, sigs: 23982, f-level: 2, builder: tomek)
Reading CVD header (daily.cvd): OK
Downloading daily.cvd [*]
daily.cvd updated (version: 496, sigs: 185, f-level: 2, builder: ccordes)
Database updated (24167 signatures) from database.clamav.net (213.230.200.242).
$ ls
daily.cvd       freshclam.log   main.cvd
$ sigtool --unpack-current daily.cvd
LibClamAV Error: Unknown type flag 3.
ERROR: Can't unpack file.

fwiw, the cvd files need to be unpacked to be usable for messagewall, my smtp proxy.

thanks for any help!