Setting up sed (4.1.5-5) ...
Errno architecture (x86_64-linux-gnu-thread-multi-2.6.18-1-amd64) does not match executable architecture (x86_64-linux-gnu-thread-multi-2.6.17-2-vserver-amd64) at /usr/local/share/perl/5.8.8/Errno.pm line 11.
Compilation failed in require at /usr/sbin/install-info line 308.
BEGIN failed--compilation aborted at /usr/sbin/install-info line 308.
dpkg: error processing sed (--configure):
 subprocess post-installation script returned error exit status 9
Errors were encountered while processing:
 sed
E: Sub-process /usr/bin/dpkg returned an error code (1)
-----
And more:

Errno architecture (x86_64-linux-gnu-thread-multi-2.6.18-1-amd64) does not match executable architecture (x86_64-linux-gnu-thread-multi-2.6.17-2-vserver-amd64) at /usr/local/share/perl/5.8.8/Errno.pm line 11.
Compilation failed in require at /usr/sbin/install-info line 308.
BEGIN failed--compilation aborted at /usr/sbin/install-info line 308.
dpkg: warning - old pre-removal script returned error exit status 9
dpkg - trying script from the new package instead ...
Errno architecture (x86_64-linux-gnu-thread-multi-2.6.18-1-amd64) does not match executable architecture (x86_64-linux-gnu-thread-multi-2.6.17-2-vserver-amd64) at /usr/local/share/perl/5.8.8/Errno.pm line 11.
Compilation failed in require at /usr/sbin/install-info line 308.
BEGIN failed--compilation aborted at /usr/sbin/install-info line 308.
dpkg: error processing /var/cache/apt/archives/readline-common_5.2-3_all.deb (--unpack):
 subprocess new pre-removal script returned error exit status 9
Errno architecture (x86_64-linux-gnu-thread-multi-2.6.18-1-amd64) does not match executable architecture (x86_64-linux-gnu-thread-multi-2.6.17-2-vserver-amd64) at /usr/local/share/perl/5.8.8/Errno.pm line 11.
Compilation failed in require at /usr/sbin/install-info line 308.
BEGIN failed--compilation aborted at /usr/sbin/install-info line 308.
dpkg: error while cleaning up:
 subprocess post-installation script returned error exit status 9