(solved) Arduino Uno + Ethenet Shield = Broken ???

Using Arduino IDE 1.x
2

That code will cause challenges. There is an empty line required on the request, and you should read the response from the server.

void loop()
{
  client.println("GET / HTTP/1.0");
  delay(5000);
}

Search the forum for web client code by zoomkat. He has both client and server code working pretty good with V1.0.

Edit: If you continue to have problems with garbage on both serial and ethernet, maybe this subject will help:
http://arduino.cc/forum/index.php/topic,88392.0.html

You may as well go to that subject right away. zoomkat's client code is there too!