The following returns undefined in Safari:

var temp = $(xml).find('yweather\\\\:condition').attr('temp');

Code snippet to work around this:

$.ajax({

type: "GET",

url: "./common/getFile.php?feed=http://weather.yahooapis.com/forecastrss?w=" + locationId,

dataType: "xml",

success: function(xml){

if ($.browser.webkit){

var temp = $(xml).find('condition').attr('temp');

var conditionText = $(xml).find('condition').attr('text');

var code = $(xml).find('condition').attr('code');

}else{ //assume Mozilla

var temp = $(xml).find('yweather\\\\:condition').attr('temp');

var conditionText = $(xml).find('yweather\\\\:condition').attr('text');

var code = $(xml).find('yweather\\\\:condition').attr('code');

}

}

...