jQuery EXPERT Needed - IE Errors - root them out and resolve

We have invested a great deal of time developing a website framework using jQuery and jQuery UI as primary methods of achieving browser compatibility while enjoying the cool effects of that framework. We have spent the time to insure that our site validates according to W3C requirements of 4.01 HTML [login to view URL] However, when launching with IE8 and presumably other IE browsers, we get blocked solid with errors that seem to have to do with the jQuery versions themselves. We are using jQuery and jQuery UI as well as a few of their plugins. We need help determining where the problem is. The site seems to perform flawlessly in Firefox, Safari and Chrome. The site can be accessed directly at [login to view URL] You will notice a debugging 'alert' comes up in other browsers but in IE that alert is never reached as it crashes first. Sincerely, CompuMatter