Missing lines in the Protovis Chart - javascript

I'm using the Parallel Coordinate Chart from the following link
http://mbostock.github.io/protovis/ex/cars-full.html
With identical cars-full.html, ex.css, cars.js and protovis-r3.2.js, the chart is displayed with missing lines. (see picture below)
Local version of Parallel Coordinate Chart
Anybody has any idea on what could possibly go wrong here?

This issue is resolved by rewriting it based on the code at github.com/mbostock/protovis/tree/master/examples/cars.

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