Google Maps script breaks Safari TypeError: Result of expression 'document.body' [null] is not an object

I'm displaying google maps in my web page and it works correctly in all browsers except for Safari.

Safri whites out the page and the JS error says:

TypeError: Result of expression 'document.body' [null] is not an object.  maps.google.com/maps/api/js?sensor=true&region=nz&async=2&callback=initializeConfigMap:11
TypeError: Result of expression 'a' [null] is not an object.  maps.gstatic.com/intl/en_us/mapfiles/api-3/5/11/main.js:30

The code this seems to be coming from is a script I'm linking to from google using this line:

$.getScript("http://maps.google.com/maps/api/js?sensor=true&region=nz&async=2&callback=initializeConfigMap", function () {});

The script looks like this:

window.google = window.google || {};
google.maps = google.maps || {};
(function() {

    function getScript(src) {
        var s = document.createElement('script');
        s.src = src;
        document.body.appendChild(s);
    }

    var modules = google.maps.modules = {};
    google.maps.__gjsload__ = function(name, text) {
        modules[name] = text;
    };

    google.maps.Load = function(apiLoad) {
        delete google.maps.Load;
        apiLoad([null,[[["http://mt0.googleapis.com/vt?lyrs=m@158\u0026src=api\u0026hl=en-US\u0026","http://mt1.googleapis.com/vt?lyrs=m@158\u0026src=api\u0026hl=en-US\u0026"],null,null,null,null,"m@158"],[["http://khm0.googleapis.com/kh?v=88\u0026hl=en-US\u0026","http://khm1.googleapis.com/kh?v=88\u0026hl=en-US\u0026"],null,null,null,1,"88"],[["http://mt0.googleapis.com/vt?lyrs=h@158\u0026src=api\u0026hl=en-US\u0026","http://mt1.googleapis.com/vt?lyrs=h@158\u0026src=api\u0026hl=en-US\u0026"],null,null,"imgtp=png32\u0026",null,"h@158"],[["http://mt0.googleapis.com/vt?lyrs=t@127,r@158\u0026src=api\u0026hl=en-US\u0026","http://mt1.googleapis.com/vt?lyrs=t@127,r@158\u0026src=api\u0026hl=en-US\u0026"],null,null,null,null,"t@127,r@158"],null,[[null,0,7,7,[[[330000000,1246050000],[386200000,1293600000]],[[366500000,1297000000],[386200000,1320034790]]],["http://mt0.gmaptiles.co.kr/mt?v=kr1.14\u0026hl=en-US\u0026","http://mt1.gmaptiles.co.kr/mt?v=kr1.14\u0026hl=en-US\u0026"]],[null,0,8,9,[[[330000000,1246050000],[386200000,1279600000]],[[345000000,1279600000],[386200000,1286700000]],[[348900000,1286700000],[386200000,1293600000]],[[354690000,1293600000],[386200000,1320034790]]],["http://mt0.gmaptiles.co.kr/mt?v=kr1.14\u0026hl=en-US\u0026","http://mt1.gmaptiles.co.kr/mt?v=kr1.14\u0026hl=en-US\u0026"]],[null,0,10,19,[[[329890840,1246055600],[386930130,1284960940]],[[344646740,1284960940],[386930130,1288476560]],[[350277470,1288476560],[386930130,1310531620]],[[370277730,1310531620],[386930130,1320034790]]],["http://mt0.gmaptiles.co.kr/mt?v=kr1.14\u0026hl=en-US\u0026","http://mt1.gmaptiles.co.kr/mt?v=kr1.14\u0026hl=en-US\u0026"]],[null,3,7,7,[[[330000000,1246050000],[386200000,1293600000]],[[366500000,1297000000],[386200000,1320034790]]],["http://mt0.gmaptiles.co.kr/mt?v=kr1p.12\u0026hl=en-US\u0026","http://mt1.gmaptiles.co.kr/mt?v=kr1p.12\u0026hl=en-US\u0026"]],[null,3,8,9,[[[330000000,1246050000],[386200000,1279600000]],[[345000000,1279600000],[386200000,1286700000]],[[348900000,1286700000],[386200000,1293600000]],[[354690000,1293600000],[386200000,1320034790]]],["http://mt0.gmaptiles.co.kr/mt?v=kr1p.12\u0026hl=en-US\u0026","http://mt1.gmaptiles.co.kr/mt?v=kr1p.12\u0026hl=en-US\u0026"]],[null,3,10,null,[[[329890840,1246055600],[386930130,1284960940]],[[344646740,1284960940],[386930130,1288476560]],[[350277470,1288476560],[386930130,1310531620]],[[370277730,1310531620],[386930130,1320034790]]],["http://mt0.gmaptiles.co.kr/mt?v=kr1p.12\u0026hl=en-US\u0026","http://mt1.gmaptiles.co.kr/mt?v=kr1p.12\u0026hl=en-US\u0026"]]],[["http://cbk0.googleapis.com/cbk?","http://cbk1.googleapis.com/cbk?"]],[["http://khmdb0.googleapis.com/kh?v=40\u0026hl=en-US\u0026","http://khmdb1.googleapis.com/kh?v=40\u0026hl=en-US\u0026"],null,null,null,null,"40"],[["http://mt0.googleapis.com/mapslt?hl=en-US\u0026","http://mt1.googleapis.com/mapslt?hl=en-US\u0026"]],[["http://mt0.googleapis.com/mapslt/ft?hl=en-US\u0026","http://mt1.googleapis.com/mapslt/ft?hl=en-US\u0026"]],[["http://mt0.googleapis.com/vt?hl=en-US\u0026","http://mt1.googleapis.com/vt?hl=en-US\u0026"]]],["en-US","NZ",null,0,null,"http://maps.google.com","http://maps.gstatic.com/intl/en_us/mapfiles/","http://csi.gstatic.com","https://maps.googleapis.com","http://maps.googleapis.com"],["http://maps.gstatic.com/intl/en_us/mapfiles/api-3/5/11","3.5.11"],[3021543403],1.0,null,null,null,null,1,"initializeConfigMap",null,null,0,"http://khm.googleapis.com/mz?v=88\u0026"], loadScriptTime);
    };
    var loadScriptTime = (new Date).getTime();
    getScript("http://maps.gstatic.com/intl/en_us/mapfiles/api-3/5/11/main.js");
})();    

I believe this might be the line causing problems:

document.body.appendChild(s);

Any ideas?