@Pedrozo
i'm not sure whether the following was changed in the source dusk/dawn skins but there were a couple of things that were throwing the text centering off - this may no longer apply though:
- the progress bar should have the transparent bits removed from the top if its still there, so the height reflects the real progress bar height, otherwise alignment calculations are off
- use the new "PanelMinusProgressBar" attribute for field alignment eg.
<top relativeTo="PanelMinusProgressBar.VerticalCenter" offset="2" />
if you dont do these things, you might get it aligning for one font size but it wont work so well for others.