I am seeing a strange problem when opening LinkManager dialog from RadEditor. The width of the dialog keeps decreasing on successive opening of the dialog. Sample page code to reproduce this is given below. You can see a video of this issue at think URL : https://goo.gl/UuPwtA Sample page code (code-behind is empty) <%@ Page Language="C#" AutoEventWireup="true"%> <!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> <telerik:RadStyleSheetManager ID="RadStyleSheetManager1" runat="server" /> </head> <body> <form id="form1" runat="server"> <telerik:RadScriptManager ID="RadScriptManager1" runat="server"> </telerik:RadScriptManager> <div> <telerik:RadEditor ID="RadEditor1" runat="server" ToolbarMode="Default" RenderMode="Lightweight" Skin="Metro"></telerik:RadEditor> </div> </form> </body> </html> Reproducible in every browser.