Since the last Patch the graphical ComboPoint View ist barely seeable. It's somehow faded out. Other Elements work just fine.
2.1.0 interface changelog by Iriel (http://forums.worldofwarcraft.com/thread.html?topicId=63167579&sid=1):
Frame alpha now propagates in the same way as scale (though is clamped between 0 and 1 on each object). This means you can cleanly fade the whole UI or specific frame assemblies.
The problem is that the background of the combo point graphic is the parent frame of actual combo point graphic. In 2.1.0 every frame alpha is multiplied by it's parent frame alpha.
So just change
self.frame.graphical[i] = CreateFrame("StatusBar", nil, self.frame.graphicalBG[i])
self.frame.graphical[i] = CreateFrame("StatusBar", nil, self.frame)
and it will look like pre 2.1.0