ICEFaces components rendering within ace:panelExpansion.
There's two issues, icefaces tags do not render when embedded in an ace panelExpansion and nor does the h:graphicImage and ice:graphicImage.

Test cases:

1. Using all icefaces tags within an ace:panelExpansion tags and HTML <img> for images causes the following error (test with auctionMonitor.xhtml):
Oct 19, 2011 9:26:21 AM com.icesoft.faces.context.DOMContext attachDOMContext
SEVERE: ICEfaces rendering required by icefaces-compat.jar components. Enable via <icecore:config render="true" />.
Oct 19, 2011 9:26:21 AM org.icefaces.impl.context.CustomPartialRenderCallback visit
SEVERE: Subtree rendering failed for class org.icefaces.ace.component.datatable.DataTable iceForm:iceTablejava.lang.UnsupportedOperationException: ICEfaces rendering required.

2. Using all JSF tags within an ace:panelExpansion tags causes the following error (test with auctionMonitor2.xhtml):
Oct 19, 2011 9:27:01 AM org.icefaces.impl.context.CustomPartialRenderCallback visit
SEVERE: Subtree rendering failed for class org.icefaces.ace.component.datatable.DataTable iceForm:iceTablejava.lang.UnsupportedOperationException: Implement writeURIAttribute

3. Using all icefaces tags within an ace:panelExpansion tags causes the following error (test with auctionMonitor3.xhtml):
Oct 19, 2011 9:27:38 AM com.icesoft.faces.context.DOMContext attachDOMContext
SEVERE: ICEfaces rendering required by icefaces-compat.jar components. Enable via <icecore:config render="true" />.
Oct 19, 2011 9:27:38 AM org.icefaces.impl.context.CustomPartialRenderCallback visit
SEVERE: Subtree rendering failed for class org.icefaces.ace.component.datatable.DataTable iceForm:iceTablejava.lang.UnsupportedOperationException: ICEfaces rendering required.

4. Using all JSF tags within an ace:panelExpansion tags and HTML <img> for images render succesfully (test with auctionMonitor4.xhtml):