I was frustrated with inconsistent result when setting the height if the WebDialogWindow in server side code (it would be too small, then explode out triple the size, despite a small increase in pixel height).

I discovered that the following would make it automatically accommodate its contents:

Style="height:auto;"

Almost - its consistently a shade too small (in IE at least), but about 5-10 pixels

The exact definition  of my window is:

<ig:WebDialogWindow runat="server" ID="dlgMessageWindow" InitialLocation="Centered" Width="500px" Modal="true"
            WindowState="Hidden" Style="line-height: normal; height:auto;" CssClass="MessageText" >
            <Header CaptionAlignment="Left" CaptionText="Psoriasis" CaptionTextCssClass="MessageHeader"> 
        <CloseBox Visible="true" />
        </Header>
        <ContentPane BackColor="White" CssClass="MessageText">
        <Template>
        <div style="text-align: center; position: relative;">
            <p>
            <asp:Literal ID="txtMessage" runat="server"></asp:Literal>
            </p>
            <input type="button" style="width: 100px;" onclick="closeCsaMessageDialog('<%= dlgMessageWindow.ClientID %>')" value='<asp:Literal runat="server" Text="Ok" />' />
            </div>
        </Template>
        </ContentPane>
    </ig:WebDialogWindow>

As you can see, i fill the asp:literal control from server side, allowing me to display formatted messages to the users.  This is working consistently - but with the slight error in height as mentioned. What can be done here, or is it a bug?