Turns out that the PostScript code which ImageMagic's convert
genreates cannot be ``condensed''. The reason is that convert's
PS code is using the "readline" operator to read lines from the input
PS file. So condensing it break the code.
Please use the following X default:
This will prevent tgif from condensing the PS file. If you are
printing/exporting with the "-print" command line argument,
you can use "-dontcondense" to achieve the same effect.