title: XHR file upload fails only from my IE 11 installation
body: <p>I even totally reset my IE 11 install, yet an XHR file upload is failing with a permissions failure from the server (HTTP error at System.Security.Permissions.FileIOPermission.EmulateFileIOPermissionsChecks). Chrome and Firefox both succeed. Interestingly, others in my group can upload successfully using IE 11. Now why would only my install be problematic? Feeling stumped ...</p>