Comment 8 for bug 394503

    I think the issue is that the behaviour of a File->Open on a blank sheet for a .jpg, .gif, or .png is not consistent with the behaviour on a .pdf file. When opening a pdf file, the original layer is replaced by a new layer with a new name and the document structure is not altered by this process.
    When opening a bitmap file like png the original layer is destroyed and the 'root' is exposed, which would otherwise never happen under ordinary circumstances.