Please note that the Mix Editor will not keep track of which item has actually changed and which hasn’t. It will simply set the “orange dot” flag on all involved items if any change was made to any item.
Torben, could you please check the latest build you have just uploaded? Windows metadata identifies it as b1426, build date 11th of March… and the problem is not fixed in that version. Perhaps you uploaded build 1426 a second time by mistake?