Flash Keyboard and Mouse Controls in Safari 5 (Windows)

After Apple released Safari 5, it seems that even after you focus on the Flash (by clicking on it), Safari still recognizes those commands for itself. One annoying problem is than when I am editing in text field, Safari will go to the previous page upon pressing backspace. Is it possible to overcome the problem by any AS3 code?

I perviously posted in the Flash Player forum but couldn't get any reply.