Can be reproduced with the following page setup: <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %> <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <telerik:RadScriptManager ID="RadScriptManager1" runat="server"> </telerik:RadScriptManager> <div style="height:930px"> Scroll down to bottom of the page and right mouse click to see context menu miss placement.... </div> <telerik:RadEditor RenderMode="Classic" ID="redHtmlEditor" runat="server" ContentAreaMode="Div"> <Content> Right-click on image to see custom menu <img style="marign-left: 6px" src="http://demos.telerik.com/aspnet-ajax/Editor/Img/productLogoLight.gif" /> <br/><br/> <p>Right-click here to see the custom Paragraph menu.<br/></p><br/> Right-click on the link to see the default link menu disabled: <a href="/">www.telerik.com</a> </Content> </telerik:RadEditor> </form> </body> </html>