The <ice:panelPopup > komponent does not work in IE8 if modal="true". Using Firebug Lite I can not find the necessary generated iframe + div (which grays out the page). Also the popup being present is not centralized as supposed to.

Pagecode:
<ui:composition xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:f="http://java.sun.com/jsf/core"
xmlns:ice="http://www.icesoft.com/icefaces/component">

<ice:panelGroup styleClass="panelPopUp">
<ice:panelPopup id="popupMessagePanel" draggable="false" visible="#{messagePopupBean.messageAvailable}" positionOnLoadOnly="true"
modal="true" autoCentre="true" >

<!-- popup headline is always info -->
<f:facet name="header">
<ice:panelGroup>
<ice:outputText value="#{common['popup.header.information']}" />
</ice:panelGroup>
</f:facet>

<f:facet name="body">
<!-- The main message header -->
<ice:panelGroup>
<ice:outputText value="#{messagePopupBean.mainHeader}" escape="false" />
<!-- Just a single message -->
<ice:panelGroup rendered="#{!empty messagePopupBean.message}">
<ice:outputText value="#{messagePopupBean.message.prefixText }" escape="false" />
<ice:outputText value="#{messagePopupBean.message.messageText}" escape="false" />
<ice:outputText value="#{messagePopupBean.message.postfixText }" escape="false" />
</ice:panelGroup>
<!-- A message list -->
<ice:panelGroup rendered="#{!empty messagePopupBean.messageList}">
<ice:dataTable id="messageListId" value="#{messagePopupBean.messageList}" var="message">
<ice:column rendered="#{!empty messagePopupBean.prefixHeader}">
<f:facet name="header">
<ice:outputText value="#{messagePopupBean.prefixHeader}" escape="false" />
</f:facet>
<ice:outputText value="#{message.prefixText}" escape="false" />
</ice:column>
<ice:column rendered="#{!empty messagePopupBean.messageHeader}">
<f:facet name="header">
<ice:outputText value="#{messagePopupBean.messageHeader}" escape="false" />
</f:facet>
<ice:outputText value="#{message.messageText}" escape="false" />
</ice:column>
<ice:column rendered="#{!empty messagePopupBean.postfixHeader}">
<f:facet name="header">
<ice:outputText value="#{messagePopupBean.postfixHeader}" escape="false" />
</f:facet>
<ice:outputText value="#{message.postfixText}" escape="false" />
</ice:column>
</ice:dataTable>
</ice:panelGroup>
<ice:panelGroup rendered="#{!messagePopupBean.noRendered}" >
<ice:commandButton action="#{messagePopupBean.ok}" value="#{cMsg['popupdialog.button.ok']}" />
</ice:panelGroup>
<ice:panelGroup rendered="#{messagePopupBean.noRendered}" >
<ice:commandButton action="#{messagePopupBean.ok}" value="#{cMsg['popupdialog.button.yes']}" />
<ice:commandButton action="#{messagePopupBean.no}" value="#{cMsg['popupdialog.button.no']}" />
<ice:panelGroup rendered="#{messagePopupBean.cancelRendered}">
<ice:commandButton action="#{messagePopupBean.cancel}" value="#{cMsg['popupdialog.button.ok']}" />
</ice:panelGroup>
</ice:panelGroup>
</ice:panelGroup>
</f:facet>
</ice:panelPopup>
</ice:panelGroup>
</ui:composition>