kubuntu installer: can't change keyboard layout.

Binary package hint: ubiquity

ISO kubuntu desktop amd64 2011.01.31

At the 'Keyboard layout' step when you change the layout either by selecting an entry with the mouse or with the arrow keys, the UI /blinks/ and the layout is reset to the default layout USA.
If you change the layout by entering the first characters of the name of the layout, it works sometimes, but I have not found a reproducible pattern.

TEST CASE:
1. Run the Kubuntu Installer
2. At the 'Keyboard Layout', click on the combo 'Layout' and select another layout than USA

Result:
The layout is automatically set back to 'USA'

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 2.6.38-1.28-generic 2.6.38-rc2
Uname: Linux 2.6.38-1-generic i686
Architecture: i386
Date: Mon Jan 31 12:16:17 2011
EcryptfsInUse: Yes
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.utf8
 LC_MESSAGES=en_US.utf8
 SHELL=/bin/bash
SourcePackage: ubiquity