There is several bugs in 2014.3.1024 release (UI for ASP.NET AJAX), here is one:
No base line showing with ShowBaseLine="true" when use "Outlook" skin (and other skins, "Black" skin is fine).
You may create a test website, and then copy the below code to repeat the issue (like showing in the picture attached). Please let me know if there is a quick fix for this:
Thanks,
Ryan
====Code below=================
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Default" %>
<!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></title>
<telerik:RadStyleSheetManager id="RadStyleSheetManager1" runat="server" />
</head>
<body>
<form id="form1" runat="server">
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
<Scripts>
<asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" />
<asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js" />
<asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQueryInclude.js" />
</Scripts>
</telerik:RadScriptManager>
<script type="text/javascript">
//Put your JavaScript code here.
</script>
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
</telerik:RadAjaxManager>
<telerik:RadSplitter runat="Server" ID="RadSplitter1" Width="100%" BorderSize="0"
BorderStyle="None" PanesBorderSize="0" Height="100%" Orientation="Horizontal"
VisibleDuringInit="false">
<telerik:RadPane ID="RadPaneMenu" runat="server" Height="30" Width="100%">
<telerik:RadTabStrip ID="Menu1" runat="server" Width="100%" ScrollChildren="true"
Skin="Outlook" ShowBaseLine="true">
<Tabs>
<telerik:RadTab Text="AAAAA" Value="0" Selected="True">
</telerik:RadTab>
<telerik:RadTab Text="BBBB" Value="1">
</telerik:RadTab>
<telerik:RadTab Text="CCCC" Value="2">
</telerik:RadTab>
<telerik:RadTab Text="DDDDD" Value="3">
</telerik:RadTab>
</Tabs>
</telerik:RadTabStrip>
</telerik:RadPane>
<telerik:RadPane ID="RadPaneMain" runat="server" Height="100%" Width="100%">
</telerik:RadPane>
</telerik:RadSplitter>
</form>
</body>
</html>