[a00021]

Runs relatively decent on Chrome 5.0.375.125. As usual, utter functional failure on Opera (10.60).

Can someone more informed explain which one is closer to the truth?

  a) Opera's JS engine does not fully support standard functionality
  b) the demo uses yet-to-be-standardized functions that have been implemented in Chrome

[mrdoob2]

Again, you'll find the answer to that (and more) in the blog post. http://mrdoob.com/blog/post/702