Greetings:
Is there ne1 installed SW2005 sp0 yet? If so, could you please try to sketch a spline. Create a second sketch on the same plane using convert entity to convert your first sketch, draw a center line and mirror it. Change your convert entity to construction entities. Now try to modify your spline of the 1st sketch by dragging it control points, does your 2nd sketch update after you commit the change for the 1st sketch? It doesn't work for me. I try different entities such as rectangle, polygon, circle, etc. Except for the parabola entity which behave similar to spline, everything else seems to work as I expected.
I try this in SW2004 and it works fine. Does anyone have an idea what I am missing?