I can confirm that this is fixed in the current version in Feisty, which uses gtkprint now.
** Changed in: gthumb (Ubuntu) Status: Confirmed => Fix Released -- GThumb prints GIFS as black smudges https://launchpad.net/bugs/26069 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs