Problem with labels
I have found a problem with the tabbed dock on windows 7, the labels on the shortcuts are not brought to the foreground and appear behind any windows that are on screen.
In the image below you can see the tabbed dock appears above the open notepad window, but the text label "Volume" appears behind it:

This happens on all Accessibility settings of Tabs on top, Regular, Show in taskbar & Show in tray.
This problem doesn't effect quick-launch (animated) docks.
Clare.