Posted: Aug 03, 2010 7:23 pm
Hmmm. “There was an error processing a page. There was a problem reading this document (135) OK” Many,many clicks later... perhaps this other Ed Witten note might help? 
http://www.sns.ias.edu/~witten/papers/mmm.pdf
http://www.sns.ias.edu/~witten/papers/mmm.pdf