'Sys.Application' is null or not an object
This does not occur on their machines with Windows XP with IE6, nor does it occur on the site when using the previous version installed (2009.3)
Any direction on what might be causing this would be helpful.
EDIT: Further investigation shows that the Telerik.Web.UI.WebResource.axd is being loaded BEFORE the ASP.NET AJAX ScriptResource.axd when the page errors. Why would this happen?