I'm sorry if I was mistaken about the Methyl Mercury / plain Mercury issue, my claim was based on some things I read about the dangers of having your dental fillings (that contain Mercury) removed, a procedure which is causing some quantity of the amalgam to evaporate and (as stated by some alarmists on the web) create methyl mercury vapors... If this is untrue, then I'll go remove my Amalgam fillings right away... :-)