I'm getting the attached error message in IE 11 when I browse to any page (with or without a Web Grid) from a page that contains a Web Grid. It also occurs if I close the browser window.

I tried to reproduce the reported problem by performing following steps:

1. Open First Experience live sample of WebGrid using IE 11 browser.
2. Navigate to other page that contains a WebGrid by clicking the right-arrow on the right-side of the sample page.
3. Close the browser window.

Everything worked smoothly and the reported problem is not reproducible.

From the screenshot, IE11 Error.png, the error happen on: IE11.js and WebUI.NET Framework 3.0.5000.969 is used.

The latest version of WebUI.NET Framework 3.0 is 3.0.5000.976 which can be downloaded from here. I recommend you to download and apply the hotfix then retest the reported problem.

Should the problem persist, please feel free to let me know. Look forward to hearing back from you.

Seems to only occur when the webgrid is on a page with a Telerik RadMenu control. If we remove the RadMenu control from the page, the error goes away.

Has there been any news of this issue? I haven't heard anything since my last post... Please forward any responses to phild@papex.com, as I am away from the office. He can provide you with any additional information or answer any questions that you may have.