I just made a few changes to that part of casper which "may" fix this bug in the process. As I don't have the environment to easily reproduce and test the fix, I'm attaching the new /etc/init.d/casper in the hope that someone can test it and see if that fixes your problem.
** Attachment added: "Casper 1.296's /etc/init.d/casper" https://bugs.launchpad.net/ubuntu/+source/casper/+bug/125702/+attachment/2634621/+files/casper.init ** Changed in: casper (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/125702 Title: casper-rw fs not cleanly unmounted on persistent live USB shutdown To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/casper/+bug/125702/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs