Linker error LNK2038: mismatch detected in Release mode

Question

I am trying to port a small app of mine from Win XP and VS 2005 to Win 7 and VS 2010.

The app compiles and runs smoothly in Debug mode, however in Release mode I get the

Answer 1

This can also be caused by setting the preprocessor definition _HAS_ITERATOR_DEBUGGING=0 in project B and not in A where A produces a lib used by B.