ubiquity crashed with KeyError in layout_reverse(): 'it'

TEST CASE:
1. Start ubiquity and proceed to the keyboard layout page
2. Click on 'Detect Keyboard Layout'
3. Answer to the questions in the detection dialog

ACTUAL RESULT:
At the end the following crash occurs:

Traceback (most recent call last):
  File "/usr/lib/ubiquity/ubiquity/plugin.py", line 48, in wrapper
    return target(self, *args, **kwargs)
  File "/usr/lib/ubiquity/plugins/ubi-console-setup.py", line 80, in calculate_result
    layout = keyboard_names.layout_reverse(l, keymap[0])
  File "/usr/lib/ubiquity/ubiquity/keyboard_names.py", line 152, in layout_reverse
    return kn.layout_reverse(lang, value)
  File "/usr/lib/ubiquity/ubiquity/keyboard_names.py", line 100, in layout_reverse
    return self._layout_rev[value]
KeyError: 'it'

Hallo
Testing today build 20120722 amd64 desktop.
I select English as language and it propose English as layout for keyboard.
I click on -Detect keyboard layout- button and followed the instructions, when the operation was ended it crash.
Thanks
Fabio

ProblemType: CrashDistroRelease: Ubuntu 12.10
Package: ubiquity 2.11.17
ProcVersionSignature: Ubuntu 3.5.0-5.5-generic 3.5.0-rc7
Uname: Linux 3.5.0-5-generic x86_64
ApportVersion: 2.4-0ubuntu4
Architecture: amd64
CasperVersion: 1.320
Date: Sun Jul 22 15:18:42 2012
ExecutablePath: /usr/lib/ubiquity/bin/ubiquity
InstallCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
InterpreterPath: /usr/bin/python3.2muLiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120722)
ProcCmdline: /usr/bin/python3 /usr/lib/ubiquity/bin/ubiquity gtk_ui
ProcEnviron: Error: [Errno 13] Permission denied: '/proc/21588/environ'
PythonArgs: ['/usr/lib/ubiquity/bin/ubiquity', 'gtk_ui']SourcePackage: ubiquity
Title: ubiquity crashed with KeyError in layout_reverse(): 'it'
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: