Text wobbles as Content changes

Hey guys,

I am using the new GUI on Unity 4.6 and I got a textpanel in which text gets written via script. As the content of the textpanel changes, the width of it changes too, which I want to prevent. By now the text just says "Stuff: 'Number' ", where as 'Number' is either 100 or 50. The changing of this is causing the unwanted wobble. My script looks like this:

  #pragma strict
     import UnityEngine.UI;
     var Number : int;
     
     function ChangeNumber (){...}
     
     function Update () 
     {
         gameObject.GetComponent.<Text>().text = "Stuff: " + Number;
     }