The file upload is there in Chrome, but it is not a field, just a button, and the chosen file appears next to it. It's the same in Safari.
In Opera the date picker is smaller (the actual calendar), and the chosen date is right aligned, while in the other browsers (IE, Ffx, Safari and Chrome, all latest versions) it is left aligned. I guess that also has to do with how browsers render the various elements.
The number can be selected in Opera, Safari and Chrome, the difference is, thet pressing the down arrow (once) in Opera produces 99999, whereas in the two other browsers you have a 0. And also the number is right aligned in Opera.