I'm currently wondering how Google manages to make Roboto look pretty much exactly the same on different browsers. If you're wondering, have a look at it in Firefox, and then a webkit browser like Chrome:
http://www.google.com/nexus/4/
Now, here's a comparison to what it looks like on a test page I've set up:

The rendering in Safari makes the font unusable. So the question is:
How does Google do it? It seems like I'm missing something? At first I thought they might be serving different fonts, but I've checked, and they are identical. I feel like I'm missing something?
Any insights are greatly appreciated!