The Skeinforge Clip plugin trims the ends of closed loops to eliminate the overlap. I’ve found that setting Clip > 0.1 causes openings in small circles that shows up in the Polyholes testpiece, so I generally run with Clip = 0.0.
Here’s a pair with Clip = 0.1 and Clip = 0.0:
As before, pretty much no difference.
The Smell of Molten Projects in the Morning 