jQuery_offset

// small fix for old safari versions compatibility

// this bug occures 
// on iPhone OS since 3.2 version (iPad)
// and on iOS since 4.0 version

// as of 1.4.2 the mobile safari reports wrong values on offset()
// http://dev.jquery.com/ticket/6446
// remove once it's fixed
if (/webkit.*mobile/i.test(navigator.userAgent)
	&& "getBoundingClientRect" in document.documentElement) {
	(function ($) {
		$.fn.offsetOld = $.fn.offset;
		$.fn.offset = function () {
			var result = this.offsetOld();
			result.top -= window.scrollY;
			result.left -= window.scrollX;

			return result;
		};
	})(jQuery);
}

I think it has been fixed in iOS 4.1 version for iPhone. Starting from iOS 4.2 it could be installed to both iPhone and iPad. My solution is:

if (/webkit.mobile/i.test(navigator.userAgent)
&& "getBoundingClientRect" in document.documentElement
&& parseFloat(/OS (.) like/ig.exec(navigator.userAgent)[1].replace('_', '.')) < 4.1) {
(function ($) {
$.fn.offsetOld = $.fn.offset;
$.fn.offset = function () {
var result = this.offsetOld();
result.top -= window.scrollY;
result.left -= window.scrollX;

        return result;
    };
})(jQuery);

};

Thanks, man -I was working on something similar, but you beat me to it. I realized after I posted I didn't account for people who are on an old version of the OS. I ended up with this:

if (/webkit.*mobile/i.test(navigator.userAgent) && parseFloat($.browser.version) < 532.9 && "getBoundingClientRect" in document.documentElement) {
...
}

I think it'll be slightly faster than the RegEx.

Yeah! It's cool solution:)