I have set the viewport to 'device-width'...on the live site and the sandbox site....and it works almost perfectly.
This is hardcoded into the html.tpl.php file.
I'm trying to figure out why on the live site it says:
<meta name="viewport" content="width=device-width">
And on the sandbox site is says:
<meta name="viewport" content="width=device-1024">
The two sites should be 100% identical....but maybe...as it looks...only 99% identical.