CSS warnings (related to MenuItem)

Using SB 2.0, I sometimes get the following warnings :

WARNING: Could not resolve '-fx-text-base-color' while resolving lookups for '-fx-text-fill' from rule '*.menu-item>*.label' in stylesheet jar:file:/C:/wksfx/sb20/scenebuilder-binaries/jdk1.8.0/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss
Sep 20, 2013 5:03:52 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-fx-text-base-color' while resolving lookups for '-fx-text-fill' from rule '*.menu-item>*.label' in stylesheet jar:file:/C:/wksfx/sb20/scenebuilder-binaries/jdk1.8.0/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss
Sep 20, 2013 5:03:52 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-fx-text-base-color' while resolving lookups for '-fx-text-fill' from rule '*.menu-item>*.label' in stylesheet jar:file:/C:/wksfx/sb20/scenebuilder-binaries/jdk1.8.0/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss
Sep 20, 2013 5:03:52 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-fx-text-base-color' while resolving lookups for '-fx-text-fill' from rule '*.menu-item>*.label' in stylesheet jar:file:/C:/wksfx/sb20/scenebuilder-binaries/jdk1.8.0/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss
Sep 20, 2013 5:03:52 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-fx-color' while resolving lookups for '-fx-background-color' from rule '*.menu-up-arrow' in stylesheet jar:file:/C:/wksfx/sb20/scenebuilder-binaries/jdk1.8.0/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss
Sep 20, 2013 5:03:52 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-fx-color' while resolving lookups for '-fx-background-color' from rule '*.menu-down-arrow' in stylesheet jar:file:/C:/wksfx/sb20/scenebuilder-binaries/jdk1.8.0/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss