What could be causing this behaviour? I'm using version 2014.1.513.45 but I tried the latest version and the some problem shows there as well.
<table>
<tr class="topMenu">
<td class="productArea">
<div>
<h5>INSERA</h5>
</div>
<div>
<h2>INSIGHT <%=Insight.Components.Security.AssemblyAttributes.GetCurrentAssemblyVersion2Numbers() %></h2>
</div>
</td>
<td style="padding:0;margin:0;">
<telerik:RadTabStrip CssClass="MyTabStrip" RenderMode="Lightweight" ID="RadTabStrip1" runat="server" Skin="" MultiPageID="RadMultiPage1" SelectedIndex="0">
<Tabs>
<telerik:RadTab CssClass="MyTab" HoveredCssClass="MyTabHovered" SelectedCssClass="MyTabSelected" IsBreak="false" ImageUrl="/Content/graphics/Home-32.png" Text="<%$Resources:Insight.Resource, Tabmenu.Tab.Start %>" Selected="True">
</telerik:RadTab>
<telerik:RadTab CssClass="MyTab" HoveredCssClass="MyTabHovered" SelectedCssClass="MyTabSelected" IsBreak="false" ImageUrl="/Content/graphics/Statistics-32.png" Text="<%$Resources:Insight.Resource, Tabmenu.Tab.Analysis %>">
</telerik:RadTab>
<telerik:RadTab CssClass="MyTab" HoveredCssClass="MyTabHovered" SelectedCssClass="MyTabSelected" IsBreak="false" ImageUrl="/Content/graphics/Coins-32.png" Text="<%$Resources:Insight.Resource, Tabmenu.Tab.Prognosis %>">
</telerik:RadTab>
<telerik:RadTab CssClass="MyTab" HoveredCssClass="MyTabHovered" SelectedCssClass="MyTabSelected" IsBreak="false" ImageUrl="/Content/graphics/Recycle Sign-32.png" Text="<%$Resources:Insight.Resource, Tabmenu.Tab.Environment %>">
</telerik:RadTab>
<telerik:RadTab CssClass="MyTab" HoveredCssClass="MyTabHovered" SelectedCssClass="MyTabSelected" IsBreak="false" ImageUrl="/Content/graphics/Page Overview -32.png" Text="<%$Resources:Insight.Resource, Tabmenu.Tab.Codeplan %>">
</telerik:RadTab>
<telerik:RadTab CssClass="MyTab" HoveredCssClass="MyTabHovered" SelectedCssClass="MyTabSelected" IsBreak="false" ImageUrl="/Content/graphics/Spade-32.png" Text="<%$Resources:Insight.Resource, Tabmenu.Tab.Miner %>">
</telerik:RadTab>
<telerik:RadTab CssClass="MyTab" HoveredCssClass="MyTabHovered" SelectedCssClass="MyTabSelected" IsBreak="false" ImageUrl="/Content/graphics/Manager-32.png" Text="<%$Resources:Insight.Resource, Tabmenu.Tab.Manager %>">
</telerik:RadTab>
<telerik:RadTab CssClass="MyTab" HoveredCssClass="MyTabHovered" SelectedCssClass="MyTabSelected" IsBreak="false" ImageUrl="/Content/graphics/Settings-32.png" Text="<%$Resources:Insight.Resource, Tabmenu.Tab.Settings %>">
</telerik:RadTab>
<telerik:RadTab CssClass="MyTab" HoveredCssClass="MyTabHovered" SelectedCssClass="MyTabSelected" IsBreak="false" ImageUrl="/Content/graphics/Question Mark-32.png" Text="<%$Resources:Insight.Resource, Tabmenu.Tab.Help %>">
</telerik:RadTab>
</Tabs>
</telerik:RadTabStrip>
</td>
<td id="companiesList" class="dropDownSelections">
<uc1:CompanyList runat="server" ID="CompanyList" />
</td>
<td id="areasList" class="dropDownSelections">
<uc1:AreaList runat="server" id="AreaList" />
</td>
<td id="loggedInInfo">
<uc1:LoggedInInfo runat="server" id="LoggedInInfo1" />
</td>
</tr>
</table>
<telerik:RadMultiPage runat="server" ID="RadMultiPage1" SelectedIndex="0">
<telerik:RadPageView ID="RadPageView1" runat="server" Height="100%" ContentUrl="/Forms/Portal.aspx" CssClass="pageView1 pageView">
</telerik:RadPageView>
<telerik:RadPageView ID="RadPageView2" runat="server" Height="100%" ContentUrl="/Forms/Analysis.aspx" CssClass="pageView2 pageView">
</telerik:RadPageView>
<telerik:RadPageView ID="RadPageView3" runat="server" Height="100%" ContentUrl="/Forms/Prognosis.aspx" CssClass="pageView3 pageView">
</telerik:RadPageView>
<telerik:RadPageView ID="RadPageView4" runat="server" Height="100%" ContentUrl="/Forms/Environment.aspx" CssClass="pageView4 pageView">
</telerik:RadPageView>
<telerik:RadPageView ID="RadPageView5" runat="server" Height="100%" ContentUrl="/Forms/Codeplan.aspx" CssClass="pageView5 pageView">
</telerik:RadPageView>
<telerik:RadPageView ID="RadPageView6" runat="server" Height="100%" ContentUrl="/Forms/Miner.aspx" CssClass="pageView6 pageView">
</telerik:RadPageView>
<telerik:RadPageView ID="RadPageView7" runat="server" Height="100%" ContentUrl="/Forms/Manager.aspx" CssClass="pageView7 pageView">
</telerik:RadPageView>
<telerik:RadPageView ID="RadPageView8" runat="server" Height="100%" ContentUrl="/Forms/Settings.aspx" CssClass="pageView8 pageView">
</telerik:RadPageView>
<telerik:RadPageView ID="RadPageView9" runat="server" Height="100%" ContentUrl="/Forms/Help.aspx" CssClass="pageView9 pageView">
</telerik:RadPageView>
</telerik:RadMultiPage>
<script type="text/javascript">
function pageLoad() {
var $ = $telerik.$;
var height = $(window).height();
var multiPage = $find("<%=RadMultiPage1.ClientID %>");
var totalHeight = height - 63;
multiPage.get_element().style.height = totalHeight + "px";
}
</script>