[boost] Linker error using Boost.Test on Windows

Hi all, Using the Boost.Test library on Windows (VC7.1) gives me the following error: libboost_unit_test_framework-vc71-mt-sgd-1_34.lib(exception_safety.obj) : error LNK2005: "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) already defined in libcpmtd.lib(newop.obj) The same occurs when I use te /MDd memory model: libboost_unit_test_framework-vc71-mt-gd-1_34.lib(exception_safety.obj) : error LNK2005: "void * __cdecl operator new(unsigned int)" (??2@YAPAXI@Z) already defined in msvcprtd.lib(newop_s.obj) Any clues? Regards Hartmut