I no longer see this with an up to date Feisty with the newest version (r2187 "Athens") of the script, sorry to bother Ubuntu with this "bug".
** Changed in: inkscape (Ubuntu) Status: Unconfirmed => Rejected -- Running Inkscape repeatedly by script causes X to use lots of CPU https://launchpad.net/bugs/87009 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs