Comment 7 for bug 136450

I can confirm this. On Ubuntu Intrepid, the error message given is:
Format: "gtk" not recognized. Use one of: canon cmap cmapx cmapx_np dia dot fig gd gd2 gif hpgl imap imap_np ismap jpe jpeg jpg mif mp pcl pdf pic plain plain-ext png ps ps2 svg svgz vml vmlz vrml vtx wbmp xdot xlib