This application is affected by the rgb.txt path change in the new Xorg 7. The application was looking for /usr/lib/X11/rgb.txt, /usr/openwin/lib/rgb.txt and /usr/X11R6/lib/X11/rgb.txt. I substituted the first path with the current one (/usr/share/X11/rgb.txt).
Created attachment 91044 [details, diff] netpbm-10.34-rgb.patch
thanks, merged into cvs