Same _exact_ code in C and D give different results — why?

[Mehrdad]

On Monday, 4 June 2012 at 16:37:45 UTC, Kagamin wrote:
> On Monday, 4 June 2012 at 13:58:22 UTC, Mehrdad wrote:
>> (@Andrej Mitrovic, mainly)
>>
>> So I was using your library :) and this happened:
>>
>> http://stackoverflow.com/questions/10878586
>>
>> Any ideas?
>
> You need to specify subsystem 4.0 or something like that, 
> google for .def file docs on dmc site.

I don't think that's the issue -- the subsystems for the C code
is Console.