I can confirm that I'm able to view other things using Flash, Java, Unity, HTML5, and Shockwave. I also have the latest version of Iron.
Just looked through an article about it and it suggested you do these three things:
- Use Chrome. Chromium may have issues with Native Client
- Type chrome://flags in address bar and enable Override software rendering list (browser restart required)
- Native Client is enabled in chrome://flags
I may have to take a look at this. Looks like it's built on the Spring engine.