Most likely has to do with not having the font you are expecting (Myriad Pro), as well as different defaults in size in browsers. My sans-serif font that you are falling back to is Droid Sans at 15 font size. The fixed width of the svg you are working with is making the whole area you are trying to fit things in to be too small.

In short: Lack of responsive web design

Mountain Lion + Chrome on a retina MBP.

On FireFox the text is also cut off and the blue bars do not show up: http://imgur.com/CfHWnzJ

Update: Upgrading from Firefox 17 to 19 fixed the issue with the blue bars.