I've notived that some font weights are not working in chrome 32.0.1700.76. IVe updated it today, and font weights smaller (lighter) than 300 are displayed as 400 for some reason, for any heading class (h1, h2, h3, h4, h6, h6).
You can test it with Lato here. I've tested it on multiple windows 7 machines, same result. http://typecast.com/preview/google/Lato