Video:
https://www.screencast.com/t/lyemH3IjT 

JavaScript error "unable to get property 'handleEvent' of undefined or null reference" from Telerik.Web.Ui.WebResource.axd is thrown.

Workaround:

function OnClientItemClicking(sender, eventArgs) {
	if ($telerik.isTouchDevice) {
		if (eventArgs.get_item().get_postBack()) {
			$telerik.$('.rmRootToggle').trigger('touchend');
		}
	}
}

Version 417 - Menu works like a charm, animation goes from top to bottom (on hover) normally; 

Version 611 upgrade - Menu breaks, Animation starts from bottom to top. (on hover) This is unexpected and breaks prior application functionality; We've tried replacing the binaries from 417 to 611 and back again to confirm this.

Due to recent changes to the keyboard accessibility of the RadMenu (i.e. it is now only accessible using the arrow keys instead of moving around using tabs), mega menus are no longer keyboard accessible.

We have designed a mega menu using a telerik RadSiteMap embedded in a RadMenu control, as suggested in the Telerik Demo site: http://demos.telerik.com/aspnet-ajax/menu/examples/megadropdown/defaultcs.aspx

However, this is no longer accessible. Previously, you could open the dropdown by pressing the down button, then move around in the dropdown using tab. Now, however, pressing tab just closes the dropdown.

We need the menu to be accessible in one way or another.

Reproduction - http://somup.com/crVYIDot19

Setup to reproduce:

<telerik:RadContextMenu ID="RadContextMenu1" runat="server">
    <Targets>
        <telerik:ContextMenuDocumentTarget />
    </Targets>
    <Items>
        <telerik:RadMenuItem Text="item">
            <ItemTemplate>
                <asp:TextBox ID="TextBox2" runat="server" />
            </ItemTemplate>
        </telerik:RadMenuItem>
    </Items>
</telerik:RadContextMenu>

<telerik:RadButton runat="server" ID="RadButton2" Text="Postback" AutoPostBack="true" />

Steps to reproduce:

• Show the context menu with a right mouse click on the document.
• Type in a custom value in the TextBox embedded in the menu.
• Perform a postback by clicking on the RadButton.
• Show the context menu again. In the textbox, pick the autocomplete suggestion by the browser.

Telerik RadMenu seems not supported in IE 10, we have telerik dll version 2010.3.1317.20
We have submenus which are not getting open when hover over the menus. Even main menus not getting open automatically when hover, 
it needs to keep on moving the cursor on the menu, then only it gets open automatically. This issue occure only in IE 10. 
It works correctly on all the other versions of browser.
Here is a link to replicate the issue when open in IE 10
http://www.exair.com
On the top nav menu bar, go to "Buy Now" menu, it has other sun menus, which are not open at all.
Please let me know how do I resolve this issue.

The boundary detection is not applied to the ContentTemplate of a ContextMenu item:

<telerik:RadContextMenu runat="server" ID="RadContextMenu1" EnableScreenBoundaryDetection="true"  >
	<Items>
		<telerik:RadMenuItem Text="Item 1" Value="1">
		</telerik:RadMenuItem>
		<telerik:RadMenuItem Text="Item 2" Value="2" >
			<GroupSettings Width="400px" />
			<ContentTemplate>
				<div style="width: 400px;">
				some content here
				</div>
			</ContentTemplate>
		</telerik:RadMenuItem>
	</Items>
</telerik:RadContextMenu>

This can be achieved if the role=menubar is set to the <ul> element containing the <li> menu items instead of the wrapper <div> element.

In this example from the WAI-ARIA Practices site, JAWS announces "1 of 3", "2 of 3", and "3 of 3" as the top-level menus are navigated.

https://www.w3.org/TR/wai-aria-practices/examples/menubar/menubar-1/menubar-1.html

 Workaround from Admin:

<script>
    function OnClientLoad(sender, args) {
        $telerik.$(sender.get_element()).removeAttr("role").find(">").attr("role", "menubar")
    }
</script>
<telerik:RadMenu runat="server" ID="RadMenu1" EnableAriaSupport="true"  RenderMode="Lightweight" OnClientLoad="OnClientLoad" TabIndex="1">