this method is sending #open: to document before doing the #updateRoot: so
it gets totally ignored.

RRRssHandler>>handleFiltered: aRequestContext
    | document context canvas root rootComponent |
    self setContentType: aRequestContext response.
    document := aRequestContext newDocument.
    root := self createDocumentRoot.
    document open: root.
    context := WARenderContext new document: document.
    [ canvas := RRRssRenderCanvas context: context.
    rootComponent := self createRootComponent.

    rootComponent updateRoot: root.
    canvas render: rootComponent.

    document close ] ensure: [ context destroy ].
    aRequestContext respond
________________________________________________________________________
I'm patching that method with this version:


handleFiltered: aRequestContext
    | document context canvas root rootComponent |
    self setContentType: aRequestContext response.
    document := aRequestContext newDocument.
    root := self createDocumentRoot.

    context := WARenderContext new document: document.
    [ canvas := RRRssRenderCanvas context: context.
    rootComponent := self createRootComponent.

    rootComponent updateRoot: root.
    document open: root.
    canvas render: rootComponent.

    document close ] ensure: [ context destroy ].
    aRequestContext respond