The First one is that on the Inquiry Command toolbar for Civil 3D 2008 and 2009 you will find that if you call it from the Map menus (MapClassic and Map3DGoespatial) some of the commands that this toolbar has will not work, so to fix it is really simple, go to the Customize User Interface (CUI) and just copy and paste the macros from the Civil Source...
The Second of them, is a little marker that looks like a flower that probably you have seen in your drawings, that rescale by itself every time that you do a zoom... if you have seen it, yes it can make you crazy... This little marker is called Geographic Marker and what happen is that by default Civil 3D 2009 has it setup to be in your drawing once you assign Coordinate System to it... How can you make it disappear? simple, just type GEOMARKERVISIBILITY on your command line and change the value for <0>...
Controls the visibility of geographic markers.(0) Geographic marker is not visible
(1) Geographic marker is visible