Jquerry errors on imac

My OSX 10.7.4 iMac has problems with something called jQuerry. Certain websites like http://plugins.bukkit.org/ , http://www.4shared.com/ , and http://mytalk.jawbone.com/jb2/mytalk/?2 do not load correctly. For the first, the entire list does not show up, the second, the login popups do not show up, and the third, update popups do not show up. I have tried loading all three sites on three different browsers, Chrome, Firefox, and Safari. When loading all three websites on a different computer, they work fine. Upon closer inspection into the error console of Google Chrome, all of the sites have errors with jQuerry that do not show up on the other computer. The errors are

Failed to load resource https://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js

Uncaught ReferenceError: $ is not defined pbo.js:261

for Bukkit,

Failed to load resource http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js

Uncaught ReferenceError: jQuery is not defined jquery.form.js:788

Uncaught ReferenceError: jQuery is not defined jquery.checkbox.js:27

Uncaught ReferenceError: jQuery is not defined jquery.cookie.js:56

Failed to load resource http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/jquery-ui.min.js

Uncaught ReferenceError: $ is not defined header.js:1

Uncaught ReferenceError: jQuery is not defined slimScroll.min.js:13

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:227

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:306

Uncaught ReferenceError: jQuery is not defined jquery.caps.js:2

Uncaught ReferenceError: $ is not defined jquery.openid.js:2

Uncaught ReferenceError: jQuery is not defined jquery.cycle.all.min.js:11

Uncaught ReferenceError: jQuery is not defined jquery.uploadify.v2.1.0.js:26

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:1387

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:1402

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:1417

Uncaught ReferenceError: $ is not defined tips.js:1

Uncaught ReferenceError: jQuery is not defined jquery.placeholder.patch.js:110

Uncaught ReferenceError: jQuery is not defined jquery.outerhtml.js:1

Uncaught ReferenceError: jQuery is not defined jquery.tipTip.js:191

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:1498

Uncaught ReferenceError: $ is not defined AjaxSuggestion.js:154

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:1736

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:1897

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:2016

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:2274

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:2393

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:2611

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:2656

Failed to load resource http://www.jscount.com/a/4/28b1a41b/z?ref=http%3A//www.google.com/url%3Fsa%3Dt%2 6rct%3Dj%26q%3D%26esrc%3Ds%26source%3Dweb%26cd%3D1%26sqi%3D2%26ved%3D0CDsQFjAA%2 6url%3Dhttp%253A%252F%252Fwww.4shared.com%252F%26ei%3DDjQxUKePK-jF0AGI_YCABw%26u sg%3DAFQjCNFy-3BY1msZ64kw5WfCs9_JAoemBg&url=http%3A//www.4shared.com/&rand=0.547 2085699439049

Uncaught ReferenceError: $ is not defined http://www.4shared.com/:2793

Failed to load resource http://www.adshost1.com/ads-sync.js?key=f11d7770d28f06c628386d47cb6eb053&tz=-4

Port error: Could not establish connection. Receiving end does not exist. miscellaneous_bindings:232

for 4shared, and

Failed to load resourcehttps://ajax.googleapis.com/ajax/libs/jqueryui/1.8.11/jquery-ui.min.js

for MyTalk. I really want to know what is going wrong and how to fix it. Thanks.