Comment #62 on issue 2801 by [email protected]: Patch: Approximates cross-staff slurs in VerticalAxisGroup vertical-skylines.
http://code.google.com/p/lilypond/issues/detail?id=2801
but otherwise handles Keith's test case (op45.ly) much better
.. in that it does less harm than earlier patches. This patch takes only 7% longer than master and causes only one collision. I'm still hoping to find an example that this patch actually improves.
