[Xmonad] XMonadContrib.Tabbed

Hi guys, I just checked out the latest xmonad, X11-extras and XMonadContrib from darcs ( figured a fresh install was a good idea ). It's all working fine, except that when I move focus to a workspace, the tabs for that workspace lose all of their titles strings. The unfocused workspace is fine. I'm also not seeing the difference in colour between the active and inactive tabs ... Have I managed to grab code-in-transit, or is this a bug ? Cheers D