Snippet from my syslog:

Dec  4 15:38:33 ubuntu ubiquity[21690]: Ubiquity 2.13.3
Dec  4 15:38:34 ubuntu ubiquity[21690]: log-output -t ubiquity laptop-detect
Dec  4 15:38:34 ubuntu ubiquity[21690]: log-output -t ubiquity laptop-detect
Dec  4 15:38:37 ubuntu ubiquity[21690]: switched to page language
Dec  4 15:38:38 ubuntu localechooser: info: debian-installer/language preseeded to 'en' (seen: false)
Dec  4 15:38:38 ubuntu localechooser: info: debian-installer/country preseeded to 'US' (seen: false)
Dec  4 15:38:38 ubuntu localechooser: info: debian-installer/locale preseeded to 'en_US.UTF-8' (seen: false)
Dec  4 15:38:38 ubuntu localechooser: info: Preseeded language ignored: unknown language code
Dec  4 15:38:38 ubuntu ubiquity[21690]: switched to page language
Dec  4 15:38:45 ubuntu localechooser: info: Language = 'en'
Dec  4 15:38:45 ubuntu localechooser: info: line=en;0;US;UTF-8;en_US.UTF-8;;console-setup
Dec  4 15:38:45 ubuntu localechooser: info: Set debian-installer/language = 'en'
Dec  4 15:38:45 ubuntu localechooser: info: Default country = 'US'
Dec  4 15:38:45 ubuntu localechooser: info: Default locale = 'en_US.UTF-8'
Dec  4 15:38:45 ubuntu localechooser: info: Set debian-installer/consoledisplay = 'console-setup'
Dec  4 15:38:45 ubuntu localechooser: info: Set debian-installer/country = 'US'
Dec  4 15:38:46 ubuntu localechooser: info: Set debian-installer/locale = 'en_US.UTF-8'
Dec  4 15:38:46 ubuntu localechooser: info: System locale (debian-installer/locale) = 'en_US.UTF-8'
Dec  4 15:38:53 ubuntu ubiquity[21690]: debconffilter_done: ubi-language (current: ubi-language)
Dec  4 15:38:53 ubuntu ubiquity[21690]: Step_before = stepLanguage
Dec  4 15:38:54 ubuntu ubiquity[21690]: switched to page prepare
Dec  4 15:39:03 ubuntu ubiquity: No drivers found for automatic installation.
Dec  4 15:39:03 ubuntu ubiquity[21690]: debconffilter_done: ubi-prepare (current: ubi-prepare)
Dec  4 15:39:03 ubuntu ubiquity[21690]: Step_before = stepPrepare
Dec  4 15:39:03 ubuntu ubiquity[21690]: Step_before = stepPrepare
Dec  4 15:39:04 ubuntu activate-dmraid: No Serial ATA RAID disks detected
Dec  4 15:39:04 ubuntu partman:   No matching physical volumes found
Dec  4 15:39:04 ubuntu partman:   Reading all physical volumes.  This may take a while...
Dec  4 15:39:04 ubuntu partman:   No volume groups found
Dec  4 15:39:04 ubuntu partman-lvm:
Dec  4 15:39:04 ubuntu partman-lvm: No volume groups found
Dec  4 15:39:04 ubuntu partman-lvm:
Dec  4 15:39:06 ubuntu ubiquity: umount: /tmp/tmp.F3t8j3goRS: not mounted
Dec  4 15:39:07 ubuntu ubiquity: umount: /tmp/tmp.6oHQ2mgMPc: not mounted
Dec  4 15:39:07 ubuntu ubiquity: umount: /tmp/tmp.hWjhpwkJYI: not mounted
Dec  4 15:39:08 ubuntu ubiquity: umount: /tmp/tmp.p8kAzQ4KM2: not mounted
Dec  4 15:40:07 ubuntu ubiquity: Use of uninitialized value in concatenation (.) or string at /usr/share/perl5/Debconf/DbDriver/File.pm line 44.
Dec  4 15:40:07 ubuntu ubiquity: Use of uninitialized value in -e at /usr/share/perl5/Debconf/DbDriver/File.pm line 46.
Dec  4 15:40:07 ubuntu ubiquity: Use of uninitialized value in pattern match (m//) at /usr/share/perl5/Debconf/DbDriver/File.pm line 47.
Dec  4 15:40:07 ubuntu ubiquity: Use of uninitialized value $directory in -d at /usr/share/perl5/Debconf/DbDriver/File.pm line 48.
Dec  4 15:40:07 ubuntu ubiquity: Use of uninitialized value $directory in concatenation (.) or string at /usr/share/perl5/Debconf/DbDriver/File.pm line 49.
Dec  4 15:40:07 ubuntu ubiquity: debconf: DbDriver "targetdb": mkdir :No such file or directory