https://bugs.freedesktop.org/show_bug.cgi?id=44694
--- Comment #1 from Benoit Jacob bjacob@mozilla.com 2012-01-11 10:37:36 PST --- I just found these alternate steps-to-reproduce:
1. Go to this URL: http://www.iquilezles.org/apps/shadertoy/ 2. in the 'Presets' drop-down, select Metatunnel 3. click 'Load'