I am stuck with this same error and I can't get past it.
here is the the html from the skin.html file:
<table width="100%" border="0" cellspacing="0" cellpadding="5">
<tr>
<td width="200" valign="top">[CONTENTPANE:1]</td>
<td valign="top"><div align="center">[CONTENTPANE]</div></td>
<td width="200" valign="top">[CONTENTPANE:2]<br />
<p> </p></td></tr>
</table>
this is from the skin.xml:
<Object>
<Token>[CONTENTPANE]</Token>
</Object>
<Object>
<Token>[CONTENTPANE:1]</Token>
</Object>
<Object>
<Token>[CONTENTPANE:2]</Token>
</Object>
and this is what is generated in the skin.ascx file
<table width="100%" border="0" cellspacing="0" cellpadding="5">
<tr>
<td width="200" valign="top"><div id="contentpane" runat="server"></div></td>
<td valign="top"><div align="center"><div id="contentpane" runat="server"></div></td>
<td width="200" valign="top"><div id="contentpane" runat="server"></div><br/>
<p> </p></td></tr>
</table>
If I remove the [CONTENTPANE:1] & [CONTENTPANE:2] the skin loads normally, meaning no errors, it just crams all the content into that one pane. If I use [CONTENTPANE:1] & [CONTENTPANE:2], I get the error when previewing and when I apply the skin the content loads as it should, but the graphics at teh top of my page do not, it loads the default instead.
please help.