VS2010 Debug Level Mismatch?

It's not a strange behavior, compiler creates different images depending on macro defines, optimization and other flags. It's better not to distribute static libraries, because the users will have to have exactly the same compiler version, standard library version, same compiler flags or you risk incompatibilities: sometimes you get linking errors, sometimes the application will crash, sometimes it will behave incorrectly.

Library writers don't have great options to point out that mixing and matching does not work. They have to trigger linker errors, always tricky and confuzzling. What doesn't work here is that you cannot mix a library that uses the STL classes with iterator debugging enabled with code that has it disabled.

Pretty fundamental mismatch, those template class objects are not the same size. If you really want to do this then you'll have to disable the diagnostics you get from the feature.

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