apt-get error

[Tom Simons]

I'm trying to do another apt-get update/upgrade on my old Debian box,
and I'm now getting the error listed below.  I've been doing
update/upgrades for years, but I'm not really familiar with the
process (mainly because it always worked).  Can anyone see what's
wrong?

# apt-get check
Reading Package Lists... Error!
E: Dynamic MMap ran out of room
E: Error occured while processing wsjt (NewVersion1)
E: Problem with MergeList
/var/lib/apt/lists/ftp.debian.org_debian_dists_stable_main_binary-i386_Packages
E: The package lists or status file could not be parsed or opened.

# ls -l /var/lib/apt/lists/ftp.debian.org_debian_dists_stable_main_binary-i386_Packages
-rw-r--r-- 1 root root 19397952 Aug 15 15:55
/var/lib/apt/lists/ftp.debian.org_debian_dists_stable_main_binary-i386_Packages

# wc -l /var/lib/apt/lists/ftp.debian.org_debian_dists_stable_main_binary-i386_Packages
 451195

# sed -n '1,/^Package: wsjt/p'
/var/lib/apt/lists/ftp.debian.org_debian_dists_stable_main_binary-i386_Packages
| wc -l
 426676

# cat apt.conf
addicks:/etc/apt# cat sources.list
deb http://lackof.org/taggart/debian woody/chkrootkit main
deb-src http://lackof.org/taggart/debian woody/chkrootkit main

deb http://ftp.debian.org/debian stable main non-free contrib
deb-src http://ftp.debian.org/debian stable main non-free contrib
deb http://non-us.debian.org/debian-non-US stable/non-US main contrib non-free
deb-src http://non-us.debian.org/debian-non-US stable/non-US main
contrib non-free

deb http://security.debian.org/ stable/updates main contrib non-free