One thing that I noticed still happens after the first patch: 1. Drop a spline object into the scene 2. The Working box control will allow you to hide planes in the Model room 3. Go back to the Assemble room 4. Drop another spline object into the scene 5. The Working box control will no longer allow you to hide/show planes in the Model room - it is still controlling the Working Box in the Assemble room. This is a relatively minor issue, but should be easy to correct. Brian