Have you try burning it at a slow speed (think 4x) ? Don't take this wrong, but I can't see how this is an Ubuntu bugs so I'm afraid I'll have to reject it (you might want to try the forums, IRC or the support tracker on Launchpad). Thanks.
** Changed in: Ubuntu Status: Unconfirmed => Rejected -- LiveCD does not burn correctly https://launchpad.net/bugs/68782 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs