Actually after some debugging here is the issue:
My browser is set to to "display intranet site in compability view". Since my staging server is in intranet it renders the application in compatibility view and the result is the bad UI.
There is a solution to force the browser to render the code in a non compability view by adding
<meta http-equiv="X-UA-Compatible" content="IE=edge" /> right after the title tag.
I tried to implement this solution by adding this tag in my master page, but unfortunately no script should be preceding the meta tag.
when i view the source of the page there are bunch of EXT.net scripts before the the meta tag:
<!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>
<link type="text/css" rel="stylesheet" href="/extjs/resources/css/ext-all-embedded-css/ext.axd?v=18167" id="ext-theme" />
<link type="text/css" rel="stylesheet" href="/extnet/resources/css/extnet-all-embedded-css/ext.axd?v=18167" />
<script type="text/javascript" src="/extjs/ext-all-js/ext.axd?v=18167"></script>
<script type="text/javascript" src="/extnet/extnet-all-js/ext.axd?v=18167"></script>
<script type="text/javascript" src="/ux/progressbarpager/progressbarpager-js/ext.axd?v=18167"></script>
<title></title>
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<link href="/Styles/Form.css" rel="stylesheet" type="text/css" />
<link href="/Styles/Site.css" rel="stylesheet" type="text/css" />
These script are probably due to registering the control in the page
<%@ Page Title="" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
Inherits="SecondaryDealLog.ActiveDealLogScreen" EnableEventValidation="false"
CodeBehind="ActiveDealLog.aspx.cs" %>
<%@ Register Src="UserControls/Feedback.ascx" TagName="Feedback" TagPrefix="uc1" %>
<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="Server">
please advice?
Thank you,