[t:inputFileUpload] error while migrating from MyFaces 1.1 to MyFaces 1.2 / trinidad 1.2

[Jean-Paul DZISIAK]

Hello,

I do use successfully the following code under MyFaces 1.1.5 / Tomahawk 1.1.6

<h:form enctype="multipart/form-data">
    <h:panelGroup>
        <t:commandButton styleClass="commandUpload" value="Go" 
action="#{adminBean.uploadCategories}"/>
        <t:outputText value="#{msg['admin.upload.categories.title']}"/>
        <t:inputFileUpload id="uploadCat" accept="text/xml"
            value="#{adminBean.uploadedCategories}"
            required="true"/>
    </h:panelGroup>
    <t:outputLabel for="uploadCat" 
value="#{msg['admin.upload.categories.missing']}" rendered="false"/>
    <t:message errorClass="formTextError" for="uploadCat" 
replaceIdWithLabel="true"/>
</h:form>

But under MyFaces 1.2.6 / Tomahawk 1.18 / trinidad 1.2.11 

a) there's no more validation (required="true") 
b) the backing method "uploadedCategories" is not called
c) the backing method "uploadCategories" got a null stream

> inStream = getUploadedCategories().getInputStream();

Help would be very appreciated...

Jean-Paul