In 3.0.4 we were able to do like this in MainMaster.Master:

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="MainMaster.Master.cs" Inherits="CounterSoft.Gemini.MasterPages.MainMaster" MasterPageFile="~/GaiawareGlobalTemplate.Master" %>
<%@ Import namespace="CounterSoft.Gemini.Utility"%>
<%@ Import namespace="CounterSoft.Gemini.Presenter.Helpers"%>

<asp:Content id="Content1" ContentPlaceholderID="ContentPlaceHolder1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server" />
        <gem:HeaderControl id="HeaderControl1" runat="server" />
        <div>
            <asp:ContentPlaceHolder ID="Main" runat="server">
            </asp:ContentPlaceHolder>
        </div>
</asp:Content>

We want to use our company global master page surrounding the Gemini tracker pages. Now after upgrading to 3.6.5 this seems to be harder. I get this error message now:

HTTP ERROR: 504

Gateway Timeout

RequestURI=http://tracker.gaiaware.net/Main.aspx

Anyone have an idea of the minimum setup for the MainMaster.Master ?

-Stian