I tried the 12/04/06 release with the new Ubiquity installer and it seemed to have fixed the problem.
** Changed in: ubiquity (Ubuntu) Status: Confirmed => Fix Released -- [FEISTY-12/01/06] Ubiquity Installer Crashed https://launchpad.net/bugs/74178 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs