I think I need to change the values for TabbedMdiContainerTabItemBorderActiveSelectedBrushKey and TabbedMdiContainerTabItemBorderActiveFocusedBrushKey, but they are "frozen" in the style sources. I understand http://msdn.microsoft.com/en-us/library/aa970057.aspx as saying this means I can't set the key values. Does this mean I should be rewriting the style templates without this attribute, or is there a better way to approach this? And out of curiosity, what was the point of freezing anything in the first place?
