diegogomezdeck at consultar.com wrote:

> Hi...
> 
> See this project in
> 
> http://www.squeakland.org/project.jsp?
> http://www.squeakland.org/uploads/Spirograph%203.005.pr
> 
> The green circle is embedded in the yellow rectangle, the yellow rectangle
> is embedded in the red one and the red is embedded in the blue one.  The
> blue, red and yellow rectangles have a non-default center of rotation.  The
> green circle has the pen down.
> 
> Each time the blue rectangle get heading in 0 degrees and the others
> rectangles have non-zero headings, the pen trail get corrupted.

It's because the transform morph gets dropped at 0 degrees. You can see 
this when you make the blue bar transparent. No solution, though.

-- Bert