What Safari version do you use? I use the version 5.0.5 and it works fine.
That feature is not possible in the theme currently. The theme would have to be modified.
Yes. But the code has to be changed. If you want, you can create a new user for me in your admin panel. In that way, I can change the code. I have done this with other users. You can trust me. You can send me the information to my email email@example.com