Attempting to graph generates an error:
"Unable to load image-loading module: ../lib/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-png.so: dlopen(../lib/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-png.so, 1): image not found"
Graphing was OK on initial gretl install, but then somehow broke. A new install repaired it once, but the issue arose again. It seems like it might be related to opening a session file, versus starting from scratch. But now even starting without a session generates the error.
I did confirm that the module in question exists in the application package, and is at the correct path.