How to fix broken packages?

I had played with the boost development packages for a while ago and now Synaptic fails to remove or add new packages, giving the below error report:

E: /var/cache/apt/archives/libboost-system_111111-natty_i386.deb: trying to overwrite '/usr/lib/libboost_system-mt.so', which is also in package libboost-system1.42-dev 1.42.0-4ubuntu2
E: /var/cache/apt/archives/libboost-filesystem_111111-natty_i386.deb: trying to overwrite '/usr/lib/libboost_filesystem-mt.so', which is also in package libboost-filesystem1.42-dev 1.42.0-4ubuntu2
E: /var/cache/apt/archives/libboost-program-options_111111-natty_i386.deb: trying to overwrite '/usr/lib/libboost_program_options-mt.so', which is also in package libboost-program-options1.42-dev 1.42.0-4ubuntu2
E: /var/cache/apt/archives/boost-quickbook_111111-natty_i386.deb: trying to overwrite '/usr/bin/quickbook', which is also in package libboost1.42-dev 1.42.0-4ubuntu2
E: /var/cache/apt/archives/libboost-test_111111-natty_i386.deb: trying to overwrite '/usr/lib/libboost_unit_test_framework-mt.so', which is also in package libboost-test1.42-dev 1.42.0-4ubuntu2
E: /var/cache/apt/archives/libboost-math_111111-natty_i386.deb: trying to overwrite '/usr/lib/libboost_math_c99-mt.so', which is also in package libboost-math1.42-dev 1.42.0-4ubuntu2
E: /var/cache/apt/archives/libboost-serialization_111111-natty_i386.deb: trying to overwrite '/usr/lib/libboost_serialization-mt.so', which is also in package libboost-serialization1.42-dev 1.42.0-4ubuntu2
E: /var/cache/apt/archives/libboost-graph_111111-natty_i386.deb: trying to overwrite '/usr/lib/libboost_graph-mt.so', which is also in package libboost-graph1.42-dev 1.42.0-4ubuntu2

How can i overcome this fault?

Thanks in advence.

Understanding dpkg�s file overwrite error