I purchased a new one of these a handful of months ago after losing my old ones.
First, it look like it is no longer being made at all. That's sad because the design idea is nice and simple.
However, I was going to say that Shapeways changed the material being used because the new version was much less tighter in grip. It was much more springy (soft?) so didn't hold tight. Also the new shape ways plastic was a very rough look, whereas the old version was very smooth.
Did you pull this from shapeways?