Hi Dan,Can you provide a code sample demonstrating the problem? What version of IE are you using?I tried a couple things in an attempt to reproduce the problem, although everything appears to be working correctly.Example
<%@ Page Language="C#" %><!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>Window with DropDownList</title></head><body> <form id="form1" runat="server"> <cool:ScriptManager ID="ScriptManager1" runat="server" /> <cool:Window ID="Window1" Runat="server" AutoShow="true" Collapsible="true" BodyStyle="padding: 6px;"> <Content> <asp:DropDownList ID="DropDownList1" runat="server"> <asp:ListItem>Item1</asp:ListItem> <asp:ListItem>Item2</asp:ListItem> <asp:ListItem>Item3</asp:ListItem> <asp:ListItem>Item4</asp:ListItem> </asp:DropDownList> </Content> </cool:Window> <cool:Window ID="Window2" Runat="server" AutoShow="true" Collapsible="true" BodyStyle="padding: 6px;"> <Content> Window 2 </Content> </cool:Window> </form></body></html>
<cool:Window ID="WindowPopup1" runat="server" AnimateTarget="true" Modal="true" CloseAction="Hide" Width="600" Height="300" Resizable="true"> <Content> <asp:UpdatePanel ID="UpdatePanelQueryBuilderKill" runat="server" UpdateMode="Conditional"> <ContentTemplate> <asp:DropDownList ID="DropDownList1" runat="server"> </asp:DropDownList> </ContentTemplate> </asp:UpdatePanel> </Content></cool:Window><cool:Window ID="WindowPopup2" runat="server" AnimateTarget="true" Modal="true" CloseAction="Hide" Width="600" Height="300" Resizable="true"> <Content> <asp:UpdatePanel ID="UpdatePanelQueryBuilderKill" runat="server" UpdateMode="Conditional"> <ContentTemplate> <asp:DropDownList ID="DropDownList1" runat="server"> </asp:DropDownList> </ContentTemplate> </asp:UpdatePanel> </Content> </cool:Window>