I noticed that jquery is loaded twice only from the Dulles VA test site:
http://www.webpagetest.org/result/120109_8A_2SZCG/
Compared to other locations:
Singapore:
http://www.webpagetest.org/result/120109_58_2SZCJ/
Sydney:
http://www.webpagetest.org/result/120109_1F_2SZCF/
London:
http://www.webpagetest.org/result/120109_9C_2SZCK/