The libraw_memmgr::free() is very simple, it just calls upper level ::free than forgets the pointer:

    void  free(void *ptr)
    {
        ::free(ptr);
        forget_ptr(ptr);
    }

So, if your code crashes in ::free(), it should crash in LibRaw's free() too. For pointer allocated by ::malloc() there is no difference between LibRaw::free() and ::free().

I cannot reproduce this problem in my Windows enviroment (VS2008 SP1, Win7/x64).
Could you please describe your enviroment in more detail (VS2008 patch level, Windows version, may be sample code)?

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