arrays && functions && pointers

[MM]

I soo hope I did not ask for something strange, but I thought rectangular arrays
would just be things like:

int arr[250][250];

Is there something I'm missing? Something that D can't do. Some speed issue?

int ar[100][50][25];

Also works, although there is this limit to its size I don't uderstand

int ar[250][250][10]; 
should in no way exceed 16MB (more like < 3MB)

(see the speedtest a few posts back)