Sun, 18 May 2008 15:04:20 +0200 wenzelm pr_matrix: proper context;
Sun, 18 May 2008 15:04:17 +0200 wenzelm guess_instance: proper context;
(0) -10000 -3000 -1000 -300 -100 -30 -10 -2 +2 +10 +30 +100 +300 +1000 +3000 +10000 +30000 tip