Is it okay to use jQuery 1.4.2 with Telerik.Web.UI version 2009.3.1314?  I've done this...
    
Thanks,
Jason
                                | <TelerikControls:RadScriptManager ID="RadScriptManager1" runat="server"> | 
| <Scripts> | 
| <asp:ScriptReference Name="Telerik.Web.UI.Common.jQuery.js" Path="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js" Assembly="Telerik.Web.UI" /> | 
| ... | 
Thanks,
Jason