I took right off in spite of your typo didn't I? LOL
While looking for charts of Triassic period CO2 levels (didn't find them although I've seen them before, hmmm) I saw other theories about bacteria causing the massive die-offs too. Plenty of theories but no solid conclusions.
well, there’s this
http://www.livescience.com/15168-embargoed-methane-burst-cleared-dinos.html
and this
http://www.sciencedaily.com/releases/2003/08/030828071722.htm
something else to keep us awake at night :-)