package libmysqlclient16 (not installed) failed to install/upgrade: trying to overwrite '/usr/lib/libmysqlclient.so.16.0.0', which is also in package mysql-cluster-client-5.1 0:7.0.9-1ubuntu7

This is from automatically-generated text from the installation process.

The Synaptic Package Manager has barfed while trying to install MySQL, among a whole raft of other packages. I can't capture the diagnostic output from the window because the application is stuck waiting for a process that apparently won't complete.

Ahhh... old X mouse bindings. Don't know if I remember. The following are what I believe to be relevant sections from the console window in Synaptic during the installation process:

Errors were encountered while processing:
 /var/cache/apt/archives/libmysqlclient16_5.1.41-3ubuntu12.6_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install. Trying to recover:

[...]

dpkg: edpkg: dependency problems prevent configuration of libqt4-sql-mysql:
 libqt4-sql-mysql depends on libmysqlclient16 (>= 5.1.21-1); however:
  Package libmysqlclient16 is not installed.
dpkg: error processing libqt4-sql-mysql (--configure):
 dependency problems - leaving unconfigured

[...]

Setting up mysql-cluster-server-5.1 (7.0.9-1ubuntu7) ...
 * Stopping MySQL database server mysqld
   ...done.
chown: cannot access `/var/run/mysqld': No such file or directory
 * Starting MySQL database server mysqld
   ...done.
/etc/init.d/mysql: line 116: /etc/mysql/debian-start: No such file or directory
invoke-rc.d: initscript mysql, action "start" failed.

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: libmysqlclient16 (not installed)
ProcVersionSignature: Ubuntu 2.6.32-24.41-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic i686
Architecture: i386
Date: Fri Aug 27 21:19:25 2010
ErrorMessage: trying to overwrite '/usr/lib/libmysqlclient.so.16.0.0', which is also in package mysql-cluster-client-5.1 0:7.0.9-1ubuntu7
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release i386 (20100816.1)
SourcePackage: mysql-dfsg-5.1
Title: package libmysqlclient16 (not installed) failed to install/upgrade: trying to overwrite '/usr/lib/libmysqlclient.so.16.0.0', which is also in package mysql-cluster-client-5.1 0:7.0.9-1ubuntu7