Hi Leonard, thanks for posting more details on your edge hiding problem.

What you're running into there is a bug where the name property of the original generating curve is actually being transmitted to some but not all of the edge curves of the resulting solid.

So once they have the same name, they all get turned on or off when using that same slot in the "Objects" section of the scene browser.

I'll get this fixed up for the next beta so that those edges will not inherit the name of the generating curve, that's kind of a bad side effect from a mechanism that tries to maintain object properties whenever an object is copied - in this case some edge curves in the resulting solid come from direct copies of the original input curve.

- Michael