Installer crashes right before compleation

Hello,
I'm trying to install Ubuntu 10.10 64bit off a flash drive and the installer keeps crashing at the same place right at the tail end of the installation. The installer says that I should file a bug report then closes down.

Here's the last part of my my /var/log/syslog:

Apr 10 15:09:02 ubuntu python: log-output -t ubiquity chroot /target update-initramfs -c -k 2.6.35-22-generic
Apr 10 15:09:02 ubuntu python: log-output -t ubiquity umount /target/tmp/.X11-unix
Apr 10 15:09:02 ubuntu python: log-output -t ubiquity chroot /target umount /sys
Apr 10 15:09:02 ubuntu python: log-output -t ubiquity chroot /target umount /proc
Apr 10 15:09:02 ubuntu python: log-output -t ubiquity umount /target/dev
Apr 10 15:09:02 ubuntu python: log-output -t ubiquity mount --bind /proc /target/proc
Apr 10 15:09:02 ubuntu python: log-output -t ubiquity mount --bind /sys /target/sys
Apr 10 15:09:02 ubuntu python: log-output -t ubiquity mount --bind /dev /target/dev
Apr 10 15:09:02 ubuntu grub-installer: info: architecture: amd64/generic
Apr 10 15:09:02 ubuntu grub-installer: info: Identified partition label for /dev/sda2: msdos
Apr 10 15:09:04 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub which isn't installed.
Apr 10 15:09:04 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub-legacy which isn't installed.
Apr 10 15:09:04 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub-efi which isn't installed.
Apr 10 15:09:04 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub-efi-amd64 which isn't installed.
Apr 10 15:09:04 ubuntu grub-installer: dpkg: warning: ignoring request to remove grub-efi-ia32 which isn't installed.
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/sda1
Apr 10 15:09:04 ubuntu ntfs-3g[19063]: Version 2010.8.8 external FUSE 28
Apr 10 15:09:04 ubuntu ntfs-3g[19063]: Mounted /dev/sda1 (Read-Only, label "Windows", NTFS 3.1)
Apr 10 15:09:04 ubuntu ntfs-3g[19063]: Cmdline options: ro
Apr 10 15:09:04 ubuntu ntfs-3g[19063]: Mount options: ro,allow_other,nonempty,relatime,fsname=/dev/sda1,blkdev,blksize=4096
Apr 10 15:09:04 ubuntu ntfs-3g[19063]: Ownership and permissions disabled, configuration type 1
Apr 10 15:09:04 ubuntu 50mounted-tests: debug: mounted as ntfs-3g filesystem
Apr 10 15:09:04 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/10freedos
Apr 10 15:09:04 ubuntu 10freedos: debug: /dev/sda1 is not a FAT partition: exiting
Apr 10 15:09:04 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/10qnx
Apr 10 15:09:04 ubuntu 10qnx: debug: /dev/sda1 is not a QNX4 partition: exiting
Apr 10 15:09:04 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/20macosx
Apr 10 15:09:04 ubuntu macosx-prober: debug: /dev/sda1 is not an HFS+ partition: exiting
Apr 10 15:09:04 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/20microsoft
Apr 10 15:09:04 ubuntu 20microsoft: debug: /dev/sda1 is a NTFS partition
Apr 10 15:09:04 ubuntu 20microsoft: result: /dev/sda1:Windows Vista (loader):Windows:chain
Apr 10 15:09:04 ubuntu 50mounted-tests: debug: os found by subtest /usr/lib/os-probes/mounted/20microsoft
Apr 10 15:09:04 ubuntu ntfs-3g[19063]: Unmounting /dev/sda1 (Windows)
Apr 10 15:09:04 ubuntu os-prober: debug: os detected by /usr/lib/os-probes/50mounted-tests
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/sda3
Apr 10 15:09:04 ubuntu 50mounted-tests: debug: /dev/sda3 is a swap partition; skipping
Apr 10 15:09:04 ubuntu os-prober: debug: os detected by /usr/lib/os-probes/50mounted-tests
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/10freedos on mounted /dev/sdb1
Apr 10 15:09:04 ubuntu 10freedos: debug: /dev/sdb1 is a FAT32 partition
Apr 10 15:09:04 ubuntu ubiquity: ls: cannot access /casper-rw-backing
Apr 10 15:09:04 ubuntu ubiquity: : No such file or directory
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/10qnx on mounted /dev/sdb1
Apr 10 15:09:04 ubuntu 10qnx: debug: /dev/sdb1 is not a QNX4 partition: exiting
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/20macosx on mounted /dev/sdb1
Apr 10 15:09:04 ubuntu macosx-prober: debug: /dev/sdb1 is not an HFS+ partition: exiting
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/20microsoft on mounted /dev/sdb1
Apr 10 15:09:04 ubuntu 20microsoft: debug: /dev/sdb1 is a FAT32 partition
Apr 10 15:09:04 ubuntu ubiquity: ls:
Apr 10 15:09:04 ubuntu ubiquity: cannot access /casper-rw-backing
Apr 10 15:09:04 ubuntu ubiquity: : No such file or directory
Apr 10 15:09:04 ubuntu ubiquity: ls: cannot access /casper-rw-backing
Apr 10 15:09:04 ubuntu ubiquity: : No such file or directory
Apr 10 15:09:04 ubuntu ubiquity: ls:
Apr 10 15:09:04 ubuntu ubiquity: cannot access /casper-rw-backing
Apr 10 15:09:04 ubuntu ubiquity: : No such file or directory
Apr 10 15:09:04 ubuntu ubiquity: ls: cannot access /casper-rw-backing
Apr 10 15:09:04 ubuntu ubiquity: : No such file or directory
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/30utility on mounted /dev/sdb1
Apr 10 15:09:04 ubuntu 30utility: debug: /dev/sdb1 is a FAT32 partition
Apr 10 15:09:04 ubuntu ubiquity: ls: cannot access /casper-rw-backing
Apr 10 15:09:04 ubuntu ubiquity: : No such file or directory
Apr 10 15:09:04 ubuntu ubiquity: ls: cannot access /casper-rw-backing
Apr 10 15:09:04 ubuntu ubiquity: : No such file or directory
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/40lsb on mounted /dev/sdb1
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/70hurd on mounted /dev/sdb1
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/80minix on mounted /dev/sdb1
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/90linux-distro on mounted /dev/sdb1
Apr 10 15:09:04 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/90solaris on mounted /dev/sdb1
Apr 10 15:09:04 ubuntu grub-installer: info: Installing grub on '/dev/sda'
Apr 10 15:09:05 ubuntu grub-installer: info: grub-install supports --no-floppy
Apr 10 15:09:05 ubuntu grub-installer: info: Running chroot /target grub-install --no-floppy --force "/dev/sda"
Apr 10 15:09:14 ubuntu grub-installer: Installation finished. No error reported.
Apr 10 15:09:14 ubuntu grub-installer: info: grub-install ran successfully
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/sda1
Apr 10 15:09:25 ubuntu ntfs-3g[19871]: Version 2010.8.8 external FUSE 28
Apr 10 15:09:25 ubuntu ntfs-3g[19871]: Mounted /dev/sda1 (Read-Only, label "Windows", NTFS 3.1)
Apr 10 15:09:25 ubuntu ntfs-3g[19871]: Cmdline options: ro
Apr 10 15:09:25 ubuntu ntfs-3g[19871]: Mount options: ro,allow_other,nonempty,relatime,fsname=/dev/sda1,blkdev,blksize=4096
Apr 10 15:09:25 ubuntu ntfs-3g[19871]: Ownership and permissions disabled, configuration type 1
Apr 10 15:09:25 ubuntu 50mounted-tests: debug: mounted as ntfs-3g filesystem
Apr 10 15:09:25 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/10freedos
Apr 10 15:09:25 ubuntu 10freedos: debug: /dev/sda1 is not a FAT partition: exiting
Apr 10 15:09:25 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/10qnx
Apr 10 15:09:25 ubuntu 10qnx: debug: /dev/sda1 is not a QNX4 partition: exiting
Apr 10 15:09:25 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/20macosx
Apr 10 15:09:25 ubuntu macosx-prober: debug: /dev/sda1 is not an HFS+ partition: exiting
Apr 10 15:09:25 ubuntu 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/20microsoft
Apr 10 15:09:25 ubuntu 20microsoft: debug: /dev/sda1 is a NTFS partition
Apr 10 15:09:25 ubuntu 20microsoft: result: /dev/sda1:Windows Vista (loader):Windows:chain
Apr 10 15:09:25 ubuntu 50mounted-tests: debug: os found by subtest /usr/lib/os-probes/mounted/20microsoft
Apr 10 15:09:25 ubuntu ntfs-3g[19871]: Unmounting /dev/sda1 (Windows)
Apr 10 15:09:25 ubuntu os-prober: debug: os detected by /usr/lib/os-probes/50mounted-tests
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/50mounted-tests on /dev/sda3
Apr 10 15:09:25 ubuntu 50mounted-tests: debug: /dev/sda3 is a swap partition; skipping
Apr 10 15:09:25 ubuntu os-prober: debug: os detected by /usr/lib/os-probes/50mounted-tests
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/10freedos on mounted /dev/sdb1
Apr 10 15:09:25 ubuntu 10freedos: debug: /dev/sdb1 is a FAT32 partition
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/10qnx on mounted /dev/sdb1
Apr 10 15:09:25 ubuntu 10qnx: debug: /dev/sdb1 is not a QNX4 partition: exiting
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/20macosx on mounted /dev/sdb1
Apr 10 15:09:25 ubuntu macosx-prober: debug: /dev/sdb1 is not an HFS+ partition: exiting
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/20microsoft on mounted /dev/sdb1
Apr 10 15:09:25 ubuntu 20microsoft: debug: /dev/sdb1 is a FAT32 partition
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/30utility on mounted /dev/sdb1
Apr 10 15:09:25 ubuntu 30utility: debug: /dev/sdb1 is a FAT32 partition
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/40lsb on mounted /dev/sdb1
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/70hurd on mounted /dev/sdb1
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/80minix on mounted /dev/sdb1
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/90linux-distro on mounted /dev/sdb1
Apr 10 15:09:25 ubuntu os-prober: debug: running /usr/lib/os-probes/mounted/90solaris on mounted /dev/sdb1
Apr 10 15:09:37 ubuntu python: log-output -t ubiquity umount -f /target/proc
Apr 10 15:09:37 ubuntu python: log-output -t ubiquity umount -f /target/sys
Apr 10 15:09:37 ubuntu python: log-output -t ubiquity umount -f /target/dev
Apr 10 15:09:37 ubuntu python: log-output -t ubiquity chroot /target mount -t proc proc /proc
Apr 10 15:09:37 ubuntu python: log-output -t ubiquity chroot /target mount -t sysfs sysfs /sys
Apr 10 15:09:37 ubuntu python: log-output -t ubiquity mount --bind /dev /target/dev
Apr 10 15:09:37 ubuntu python: Traceback (most recent call last):
Apr 10 15:09:37 ubuntu python: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 739, in do_install
Apr 10 15:09:37 ubuntu python: if not cache.commit(fetchprogress, installprogress):
Apr 10 15:09:37 ubuntu python: File "/usr/lib/python2.6/dist-packages/apt/deprecation.py", line 98, in deprecated_function
Apr 10 15:09:37 ubuntu python: return func(*args, **kwds)
Apr 10 15:09:37 ubuntu python: File "/usr/lib/python2.6/dist-packages/apt/cache.py", line 424, in commit
Apr 10 15:09:37 ubuntu python: res = self._fetch_archives(fetcher, pm)
Apr 10 15:09:37 ubuntu python: File "/usr/lib/python2.6/dist-packages/apt/cache.py", line 271, in _fetch_archives
Apr 10 15:09:37 ubuntu python: raise LockFailedException("Failed to lock %s" % lockfile)
Apr 10 15:09:37 ubuntu python: LockFailedException: Failed to lock /target/var/cache/apt/archives/lock
Apr 10 15:09:37 ubuntu python:
Apr 10 15:09:37 ubuntu python: log-output -t ubiquity chroot /target umount /sys
Apr 10 15:09:37 ubuntu python: log-output -t ubiquity chroot /target umount /proc
Apr 10 15:09:37 ubuntu python: log-output -t ubiquity umount /target/dev
Apr 10 15:09:39 ubuntu ubiquity: /usr/lib/python2.6/dist-packages/apt/deprecation.py:96: UserWarning: Deprecated parameter 'autoFix'
Apr 10 15:09:39 ubuntu ubiquity: warnings.warn("Deprecated parameter %r" % key)
Apr 10 15:09:39 ubuntu python: log-output -t ubiquity chroot /target mount -t proc proc /proc
Apr 10 15:09:39 ubuntu python: log-output -t ubiquity chroot /target mount -t sysfs sysfs /sys
Apr 10 15:09:39 ubuntu python: log-output -t ubiquity mount --bind /dev /target/dev
Apr 10 15:09:39 ubuntu python: log-output -t ubiquity chroot /target umount /sys
Apr 10 15:09:39 ubuntu python: log-output -t ubiquity chroot /target umount /proc
Apr 10 15:09:39 ubuntu python: log-output -t ubiquity umount /target/dev
Apr 10 15:09:39 ubuntu python: log-output -t ubiquity umount /target/cdrom
Apr 10 15:09:39 ubuntu finish-install: Disabling CD in sources.list
Apr 10 15:09:39 ubuntu python: Exception during installation:
Apr 10 15:09:39 ubuntu python: Traceback (most recent call last):
Apr 10 15:09:39 ubuntu python: File "/usr/share/ubiquity/plugininstall.py", line 1424, in <module>
Apr 10 15:09:39 ubuntu python: install.run()
Apr 10 15:09:39 ubuntu python: File "/usr/share/ubiquity/plugininstall.py", line 54, in wrapper
Apr 10 15:09:39 ubuntu python: func(self)
Apr 10 15:09:39 ubuntu python: File "/usr/share/ubiquity/plugininstall.py", line 187, in run
Apr 10 15:09:39 ubuntu python: self.remove_extras()
Apr 10 15:09:39 ubuntu python: File "/usr/share/ubiquity/plugininstall.py", line 1214, in remove_extras
Apr 10 15:09:39 ubuntu python: self.do_remove(regular)
Apr 10 15:09:39 ubuntu python: File "/usr/share/ubiquity/plugininstall.py", line 871, in do_remove
Apr 10 15:09:39 ubuntu python: if not cache.commit(fetchprogress, installprogress):
Apr 10 15:09:39 ubuntu python: File "/usr/lib/python2.6/dist-packages/apt/deprecation.py", line 98, in deprecated_function
Apr 10 15:09:39 ubuntu python: return func(*args, **kwds)
Apr 10 15:09:39 ubuntu python: File "/usr/lib/python2.6/dist-packages/apt/cache.py", line 424, in commit
Apr 10 15:09:39 ubuntu python: res = self._fetch_archives(fetcher, pm)
Apr 10 15:09:39 ubuntu python: File "/usr/lib/python2.6/dist-packages/apt/cache.py", line 271, in _fetch_archives
Apr 10 15:09:39 ubuntu python: raise LockFailedException("Failed to lock %s" % lockfile)
Apr 10 15:09:39 ubuntu python: LockFailedException: Failed to lock /target/var/cache/apt/archives/lock
Apr 10 15:09:39 ubuntu python:
Apr 10 15:10:47 ubuntu gdm-binary[20387]: WARNING: Unable to find users: no seat-id found
Apr 10 15:10:47 ubuntu gdm-binary[20387]: WARNING: GdmDisplay: display lasted 0.084121 seconds
Apr 10 15:10:47 ubuntu acpid: client connected from 20404[0:0]
Apr 10 15:10:47 ubuntu acpid: 1 client rule loaded
Apr 10 15:10:48 ubuntu kernel: [ 611.471320] [drm] nouveau 0000:03:00.0: Allocating FIFO number 3
Apr 10 15:10:48 ubuntu kernel: [ 611.474060] [drm] nouveau 0000:03:00.0: nouveau_channel_alloc: initialised FIFO 3
Apr 10 15:10:48 ubuntu gdm-session-worker[20414]: GLib-GObject-CRITICAL: g_value_get_boolean: assertion `G_VALUE_HOLDS_BOOLEAN (value)' failed