XHTML/JSF not properly highlighting

[SvenskNavi]

Sample xhtml file:

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
                xmlns:ui="http://xmlns.jcp.org/jsf/facelets">
    <ui:define name="title">
        Title
    </ui:define>
</ui:composition>

The ui:composition tag gets highlighted correctly, but then any other non-standard html (such as ui:define) renders everything except the namespace name in all white.