jQuery errors in debug mode. (machine issue?)

jQuery errors in debug mode. (machine issue?)

I'm getting an error(s) in VS 2010. I'm not sure if it's jQuery or not, but it's definitely js. I'm using Telerik controls. I seem to be the only one getting the error(s). If I run my project, on certain pages (most) I'll get ID is undefined and it breaks with a dynamic window showing only this: cr_real_detachEvent("onload", window.CR_IE8_EVENTS[ ID ].handler);

If I continue on and ignore the error, it seems to work fine...just annoying. On subsequent postbacks I'll sometimes get (and it could be more than once) Object doesn't support this property or method. Here is the code where that happens:         element.detachEvent('on' + eventName, browserHandler);
The eventName variable is "unload". 
Somehow I think this has something to do with installing VS 2012. Even though I've uninstalled it and done a repair of VS 2010, I'm still having these problems. 

One last thing. If I'm in IE and I change the Document Mode to IE9 through the developer tools (F12), the errors stop, but it basterdizes the styles on my page.
Any help would be greatly appreciated!