Now that the control and skin have the same styleclass etc, any css rules that match one match both. This is normally ok execpt for font sizes in ems as they are relative to the parents font size. Eg you have a base font size of 16px on Windows and you have a css rule for a Label with 2em. The Label Control's font size will be 32px and the LabelSkin's font size will be 64px which will be what is used for the Text node inside the skin.

This shows up in Ensemble where all the headers are now double size.