As far as I know - all patches from the mailing list have been applied. At least in the latest developement snapshot (downloadable from our therion web site) - this should be the case. Could you please try this one and not 0.5.1?
> I have read about the need to upgrade to therion 0.5.1. So I am busy at work > compiling. Unfortunately it fails with the line > | lxRender.cxx:(.text+0x59a): undefined reference to `vtk_png_write_end' Which OS do you use? It looks, like you are missing libpng. How did you installed VTK? Do you have "libpng-devel" package installed in your system? Usualy one of make config-linux or make config-debian seems to work. Which one do you use? Regards, S.