installation fails

Binary package hint: gnuplot

sudo apt-get install gnuplot-x11

takes ages, then it fails to install gnuplot-nox

output below:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  gnuplot-nox libwxbase2.8-0 libwxgtk2.8-0
Suggested packages:
  gnuplot-doc libgnomeprintui2.2-0
Recommended packages:
  groff
The following NEW packages will be installed:
  gnuplot-x11 libwxbase2.8-0 libwxgtk2.8-0
The following packages will be upgraded:
  gnuplot-nox
1 upgraded, 3 newly installed, 0 to remove and 4 not upgraded.
1 not fully installed or removed.
Need to get 6,000kB of archives.
After this operation, 16.6MB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://nl.archive.ubuntu.com/ubuntu/ maverick/universe gnuplot-nox amd64 4.4.0-1 [1,074kB]
Get:2 http://nl.archive.ubuntu.com/ubuntu/ maverick/universe libwxbase2.8-0 amd64 2.8.11.0-0ubuntu4 [671kB]
Get:3 http://nl.archive.ubuntu.com/ubuntu/ maverick/universe libwxgtk2.8-0 amd64 2.8.11.0-0ubuntu4 [3,470kB]
Get:4 http://nl.archive.ubuntu.com/ubuntu/ maverick/universe gnuplot-x11 amd64 4.4.0-1 [786kB]
Fetched 6,000kB in 9s (649kB/s)
(Reading database ...
dpkg: warning: files list file for package `gnuplot-nox' missing, assuming package has no files currently installed.
(Reading database ... 254385 files and directories currently installed.)
Preparing to replace gnuplot-nox 4.4.0-1 (using .../gnuplot-nox_4.4.0-1_amd64.deb) ...
Unpacking replacement gnuplot-nox ...
dpkg: error processing /var/cache/apt/archives/gnuplot-nox_4.4.0-1_amd64.deb (--unpack):
 unable to install new version of `/usr/share/gnuplot/pm3d/README': No such file or directory
Selecting previously deselected package libwxbase2.8-0.
Unpacking libwxbase2.8-0 (from .../libwxbase2.8-0_2.8.11.0-0ubuntu4_amd64.deb) ...
Selecting previously deselected package libwxgtk2.8-0.
Unpacking libwxgtk2.8-0 (from .../libwxgtk2.8-0_2.8.11.0-0ubuntu4_amd64.deb) ...
Selecting previously deselected package gnuplot-x11.
Unpacking gnuplot-x11 (from .../gnuplot-x11_4.4.0-1_amd64.deb) ...
Adding 'diversion of /usr/bin/gnuplot to /usr/bin/gnuplot-nox by gnuplot-x11'
Adding 'diversion of /usr/share/man/man1/gnuplot.1.gz to /usr/share/man/man1/gnuplot-nox.1.gz by gnuplot-x11'
Processing triggers for man-db ...
Processing triggers for menu ...
Errors were encountered while processing:
 /var/cache/apt/archives/gnuplot-nox_4.4.0-1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)