Can't you hear the thunder?

The fourth best Australian song of all time, performed at the 1983 US Festival, at the high point of its (and its performer's) popularity.



This song run into a copyright lawsuit based on the flute solo, which comes from the Australian children's tune "Kookaburra Sits In The Old Gum Tree". I don't like these kind of lawsuits (unless they involve the Rubinoos suing Avril Lavrigne), and don't understand the crux is "ten seconds from your thirty year old song ripped off our seventy year old song". Shouldn't there be a statute of limitations on these things?