Yeah, I'm interested too. I might be wrong, but AFAIK there aren't any specs on how a browser should implement forward/back buttons, right?

I'm personally getting a ton of mileage on the Safari's much more stable forward/back cache, the fact that you can go back reliably gives me more comfort than other browsers where going back usually refreshes the page (although I can't really explain how this is much better). I personally feel that this bug is more of a web app bug rather than the browser.