Is Mac/Chrome web player any different from anything else?

I've got a web player app that works fine in Windows (Chrome / IE / Firefox), and ok on Mac (Firefox / Safari), but on the Mac, in Chrome, there's a script that isn't responding. Specifically, I modified MouseLook to require the button to be held down for the camera to pivot around (mouse drag look, essentially). It's not happening. I have other things like GUI labels (for menus) and in-scene elements that respond just fine otherwise, just this one thing is different?

Any idea why this might be, or how I might track it down?

There was an issue in 2009 with chrome and mac osx. May be this issue is still not solved:

We have found Mac Chrome completely unusable with Unity and we are planning to discontinue support for now