I have a TreeView in a Popup. The content of the TreeView may change even for unchanged TreeItem's values depending on some context. I am trying to update the TreeView using sequence:
treeView.setRoot(null);
treeView.setRoot(rootItem);

The second line gives me a bunch of "Could not resolve" messages:

sty 08, 2015 9:41:13 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-fx-text-background-color' while resolving lookups for '-fx-text-fill' from rule '*.tree-cell' in stylesheet jar:file:/C:/Programy/Java/jdk1.8.0_25/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss
sty 08, 2015 9:41:13 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-item-color' while resolving lookups for '-fx-background-color' from rule '*.popupContent *.tree-cell:filled' in stylesheet file:/C:/Projekt/TESIS/ARGON/workspace/others/popup-content-updates/bin/popup.css
sty 08, 2015 9:41:13 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-fx-text-background-color' while resolving lookups for '-fx-background-color' from rule '*.tree-cell>*.tree-disclosure-node>*.arrow' in stylesheet jar:file:/C:/Programy/Java/jdk1.8.0_25/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss
sty 08, 2015 9:41:13 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-fx-text-background-color' while resolving lookups for '-fx-text-fill' from rule '*.tree-cell' in stylesheet jar:file:/C:/Programy/Java/jdk1.8.0_25/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss
sty 08, 2015 9:41:13 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-item-color' while resolving lookups for '-fx-background-color' from rule '*.popupContent *.tree-cell:filled' in stylesheet file:/C:/Projekt/TESIS/ARGON/workspace/others/popup-content-updates/bin/popup.css
sty 08, 2015 9:41:13 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-fx-text-background-color' while resolving lookups for '-fx-text-fill' from rule '*.tree-cell' in stylesheet jar:file:/C:/Programy/Java/jdk1.8.0_25/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss
sty 08, 2015 9:41:13 PM javafx.scene.CssStyleHelper calculateValue
WARNING: Could not resolve '-fx-control-inner-background' while resolving lookups for '-fx-background-color' from rule '*.tree-cell' in stylesheet jar:file:/C:/Programy/Java/jdk1.8.0_25/jre/lib/ext/jfxrt.jar!/com/sun/javafx/scene/control/skin/modena/modena.bss


I found RT-37047 and my issue looks similar, but exists on both 8u20 and 8u25.