http://forum.dlang.org/thread/zhtmthkcijzutkwvyfvi@forum.dlang.org

Sending a static array larger than 32 Byte fails with the error (dmd 2.068, same with 2.066 based ldc, so probably no recent regression):
dmd/phobos/std/variant.d(633): Error: new can only create structs, dynamic arrays or class objects, not int[9]'s
dmd/phobos/std/variant.d(344): Error: new can only create structs, dynamic arrays or class objects, not int[9]'s
[...]

I tested this string[n], int[n] and byte[n] - if the array is 32 Byte or smaller, it works fine.

As the limit is the same, this is perhaps related to https://issues.dlang.org/show_bug.cgi?id=10740 (although the error message is different)

Test programm:
 
import std.concurrency;
import std.stdio;

void fun() {
	receive((byte[33] data) { writeln(data);});
}

void main() {
	byte[33] data;
	pragma(msg, data.sizeof);
	auto tid = spawn(&fun);
	send(tid, data);
}