Whenever I lauch a new nautilus window, I see approx 80 defunct sh processes. These are all the child processes of hyperbola. I do not know the function of hyperbola in nautilus. I am not qualified to debug this, so I am doing a bug report.
this is not a bug, just don't watch the output :) The issue is that Nautilus has support for a new feature in ScrollKeeper 0.4 (which hasn't been released yet).