sci-chemistry/povscript+-2.1.2.2.19 is out since 2007-11-2. I renamed the latest ebuild and tested it on x86. from http://www.stanford.edu/~fenn/povscript/ChangeLog v. 2.19 Fri Nov 2 17:52:13 PDT 2007 - add probe_radius parameter for generated surfaces
Fixed, thanks!