Aha, someone changed the first link on page Problem from purpose to obstacle. Its a little bit like butterfly effect :) http://en.wikipedia.org/w/index.php?ti

Aha, someone changed the first link on page Problem from purpose to obstacle. Its a little bit like butterfly effect :) http://en.wikipedia.org/w/index.php?title=Problem&action=history http://en.wikipedia.org/w/index.php?title=Problem&action...