To Michael... Is this a bug?

 From:  Michael Gibson
253.5 In reply to 253.2 
Pilou wrote:
> Just d├ęplace the circle :)
> But sure when circle is there, there is something curious :)
> maybe because it's on the rail path?

Yup, the shapes are treated differently if they are on the path. If they are on the path they will not be modified, that shape will be used right at that spot on the rail.

Once you move the circle away, you are triggering the "auto-place" mode that will automatically position the profile for you.

- Michael