I got rid of the nested panes, and still no luck, maybe if I show the whole skin someone can see something...
<TABLE class="pagemaster" border="0" cellspacing="0" cellpadding="0">
<TR>
<TD valign="middle">
<TABLE class="skinmaster" width="100%" border="0" align="center" cellspacing="0" cellpadding="0">
<tr>
<td valign="top">
<table style="width: 100%">
<tr>
<td runat="server" colspan="2" style="height: 119px" class="headerpane" id="HeaderPane" valign="top">
</td>
</tr>
<tr>
<td runat="server" style="width: 77%; height: 76px" class="toppane" id="TopPane" valign="top">
</td>
<td rowspan="2" style="width: 23%">
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td runat="server" valign="top" align="center" id="RightTopPane" class="righttoppane">
<dnn:INVSIDEMENU id="dnnInvSideMenu"
runat="server"
RootTab="-1"
MenuHeaderCssClass="MenuHdr"
MenuHeaderHighlighterCssClass="MenuHdr"
MenuItemCssClass="MenuItem"
MenuHighlightCssClass="MenuItemMouseOver"
CurrentHeaderCssClass="currentHeaderHighlight"
CurrentItemCssClass="currentItemHighlight"
TreatTopLevelAsHeader="true"
DrawSeparator="false"
DrawTrailingHR="false"
CurrentSubTreeOnly="True" />
</td>
</tr>
<tr>
<td runat="server" valign="bottom" align="center" id="RightBottomPane" class="rightbottompane">
<dnn:LOGO id="dnnLOGO" runat="server" OnLoad="dnnLOGO_Load"></dnn:LOGO>
</td>
</tr>
</table>
</td>
</tr>
<tr>
<td runat="server" style="width: 77%;" class="contentpane" id="ContentPane" align="center" valign="top">
</td>
</tr>
<tr>
<td style="width: 77%; height: 33px" class="bottompane" id="BottomPane">
<dnn:COPYRIGHT runat="server" id="dnnCOPYRIGHT" CssClass="LightBG" /> <dnn:TERMS runat="server" id="dnnTERMS" CssClass="LightBG"/> <dnn:PRIVACY runat="server" id="dnnPRIVACY" CssClass="LightBG" /> <br> <dnn:LINKS runat="server" id="dnnLINKS" CssClass="LightBG" />
</td>
<td runat="server" style="width: 23%; height: 33px" class="bottomrightpane" id="BottomRightPane">
</td>
</tr>
</table>
</td>
</tr>
</TABLE>
</TD>
</TR>
</TABLE>