Sorry, forgot to mention version is 1.0r1 on gentoo.
I get the following when trying to run the png command or save image:
error writing " testing.png"! Please check directory...
This is irrespective of user/directory, so I don't think permissions are the problem.
I think perhaps the most important problem is that we are trying to understand the fundamental workings of the universe via a language devised for telling one another when the best fruit is.
-- Terry Pratchett, alt.fan.pratchett
Bioinformatics and Computational Biology Unit
Department of Biochemistry
University of Pretoria