Ubiquity 16.10.3
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "overlay-scrollbar"
/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py:53: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk, Gdk, GObject, GLib, Atk
/usr/lib/ubiquity/plugins/ubi-timezone.py:194: PyGIWarning: TimezoneMap was imported without specifying a version first. Use gi.require_version('TimezoneMap', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import TimezoneMap
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "overlay-scrollbar"
/usr/lib/ubiquity/ubiquity/misc.py:654: PyGIWarning: Xkl was imported without specifying a version first. Use gi.require_version('Xkl', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import Xkl, GdkX11
update_release_notes_label()
update_release_notes_label()
Could not translate page (prepare): 'NoneType' object has no attribute 'replace'
Your console font configuration will be updated the next time your system
boots. If you want to update it now, run 'setupcon' from a virtual console.
update-initramfs is disabled since running on read-only media
debconf: DbDriver "passwords" warning: could not open /var/cache/debconf/passwords.dat: Permission denied
No such schema 'org.mate.SettingsDaemon.plugins.media-keys'

(a11y-profile-manager-indicator:3568): Gdk-WARNING **: a11y-profile-manager-indicator: Fatal IO error 2 (No such file or directory) on X server :0.

Ubiquity 16.10.3
Gtk-Message: Failed to load module "overlay-scrollbar"
/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py:53: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk, Gdk, GObject, GLib, Atk
/usr/lib/ubiquity/plugins/ubi-timezone.py:194: PyGIWarning: TimezoneMap was imported without specifying a version first. Use gi.require_version('TimezoneMap', '1.0') before import to ensure that the right version gets loaded.
  from gi.repository import TimezoneMap
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: Failed to load module "overlay-scrollbar"
update_release_notes_label()
update_release_notes_label()
Could not translate page (prepare): 'NoneType' object has no attribute 'replace'
/usr/lib/ubiquity/plugins/ubi-timezone.py:98: PyGIWarning: Soup was imported without specifying a version first. Use gi.require_version('Soup', '2.4') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk, GObject, GLib, Soup
/usr/lib/ubiquity/plugins/ubi-console-setup.py:116: Warning: Source ID 859 was not found when attempting to remove it
  GLib.source_remove(self.keyboard_layout_timeout_id)
/usr/lib/ubiquity/plugins/ubi-console-setup.py:116: Warning: Source ID 1117 was not found when attempting to remove it
  GLib.source_remove(self.keyboard_layout_timeout_id)
/usr/lib/ubiquity/plugins/ubi-console-setup.py:138: Warning: Source ID 861 was not found when attempting to remove it
  GLib.source_remove(self.keyboard_variant_timeout_id)
Gtk-Message: Failed to load module "overlay-scrollbar"
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
debconf: DbDriver "passwords" warning: could not open /var/cache/debconf/passwords.dat: Permission denied
Exception caught in process_line:
Traceback (most recent call last):
  File "/usr/lib/ubiquity/ubiquity/filteredcommand.py", line 145, in process_line
    return self.dbfilter.process_line()
  File "/usr/lib/ubiquity/ubiquity/debconffilter.py", line 430, in process_line
    data = self.db.command(command, *params)
  File "/usr/lib/python3/dist-packages/debconf.py", line 66, in command
    self.write.write("%s %s\n" % (command, ' '.join(map(str, params))))
ValueError: I/O operation on closed file.
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.