I just ran into an issue on IE8 where if the allowFlash is set to true IE will throw a JS script error and grey out the "add Files Button". This only happens in IE8 and works fine in IE8 Compatibility mode.

I opened a JIRA issue on it, but is anyone else seeing this?

https://jira.jboss.org/jira/browse/RF-7190

Works fine in Chrome, Safari4, FF3 and IE7

<rich:modalPanel id="fileUpload" width="420" height="205" keepVisualState="true">
 <f:facet name="header">
 <h:outputText value="Upload Files" />
 </f:facet>
 <f:facet name="controls">
 <h:panelGroup>
 <h:graphicImage value="/img/close.png" styleClass="hidelink" id="hidelinkFile"/>
 <rich:componentControl for="fileUpload" attachTo="hidelinkFile" operation="hide" event="onclick"/>
 </h:panelGroup>
 </f:facet>
 <h:form id="fileUploadForm">
 <rich:fileUpload fileUploadListener="#{sfopportunity.uploadSFOpportunityFile}"
 listHeight="125"
 maxFilesQuantity="10"
 id="upload"
 addControlLabel="Add Files"
 immediateUpload="false"
 acceptedTypes="pdf, doc, docx, xls, xlsx, txt, csv, jpg, jpeg, gif, bmp, tif, tiff" allowFlash="false" autoclear="true">
 <a:support event="onuploadcomplete" reRender="info" oncomplete="#{rich:component('fileUpload')}.hide()"/>
 <f:facet name="label">
 <h:outputText value="{_KB}KB of {KB}KB uploaded --- {mm}:{ss}" />
 </f:facet>
 </rich:fileUpload>
 </h:form>
 </rich:modalPanel>