Damn1t, I had this really epic tale that basically compared ".03" to a STD but when I went to hit post, it wanted me to log in (because it was so long) and it was lost. It had dudes unknowingly spreading the .03 disease to every controller they touched, OEM's left in the aftermath. Riveting stuff.
Now I'm too lazy to do it again. You need to install 21.03 specifically, any'ol 21 will not work.