I can't remember the exact details now but the gist of it was that Andy and Jamie were both picked to play DC against Argentina in Argentina. Andy opted not to go because of an injury and Jamie waxed lyrical about how unprofessional it was of Andy to put his career before his country or words to that effect. I can remember thinking that it all sounded a bit like sour grapes from Jamie but, of course, the press loved it. I think it caused quite a bit of family ill-feeling for a while!
I seem to remember that Andy didn't tell him directly - he said later because he feared his reaction - and so Jamie was understandably angry. Can't remember the details though.