foreach is a very bad choice for solving this. I blindly took it over from the original code. Need to get some sleep :).
This now definitely works, and is also the shortest:
void removeAt(T)(ref T[] arr, size_t index){
for(auto i = index; i; i--) arr[i] = arr[i - 1];
arr = arr[1 .. $];
}
Timon
