In freebsd 7.0bata4/i386 and freebsd8.0current/amd64,socket.connect in gdc's socket.d ,can't work.it cause my program core dump.
for example:
A.d
------------------------
import std.socket;
import std.socketstream;
import std.stdio;

int main()
{
    Socket sock = new Socket(AddressFamily.INET, SocketType.STREAM, 
ProtocolType.IP);
    writefln("Befor");
    sock.connect(new InternetAddress("www.digitalmars.com", 80));
writefln("After");
//  SocketStream ss = new SocketStream(sock);

 //   ss.writeString("GET /d/intro.html HTTP/1.1\r\n"
//       "Host: www.digitalmars.com\r\n"
//       "\r\n");

  //  while(ss.readLine().length) {} //skip header
   // while(!ss.eof())
    {
       char[] line;
//       printf("%.*s\n", ss.readLine());
    }

    return 0;
}
--------------------------------------
it can compile well,but it core dump at sock.connect(new InternetAddress("www.digitalmars.com", 80));

How-To-Repeat: install gdc from ports in freebsd 8.0current.and compile following and run it.
import std.socket;
import std.socketstream;
import std.stdio;

int main()
{
    Socket sock = new Socket(AddressFamily.INET, SocketType.STREAM, 
ProtocolType.IP);
    writefln("Befor");
    sock.connect(new InternetAddress("www.digitalmars.com", 80));
writefln("After");
//  SocketStream ss = new SocketStream(sock);

 //   ss.writeString("GET /d/intro.html HTTP/1.1\r\n"
//       "Host: www.digitalmars.com\r\n"
//       "\r\n");

  //  while(ss.readLine().length) {} //skip header
   // while(!ss.eof())
    {
       char[] line;
//       printf("%.*s\n", ss.readLine());
    }

    return 0;
}