Comment 4 for bug 1400297

If you're developing targeting ubuntu-sdk-14.10 as toolkit, you could use the workaround in the page definition:

        property Item __oldContents: null
        Connections {
            target: page.head
            onContentsChanged: {
                if (page.__oldContents) {
                    page.__oldContents.parent = null;
                }
                page.__oldContents = page.head.contents;
            }
        }

see also the attached file.