This is a bug that should be fixed in the next release, in the meantime
there is a workaround:
Included in the tarball are the 246 iso country coded "flag" icons for the keyboard indicator in 22px size for a dark panel background. Each of these flags consists of a box with the two letters of the iso code inside.
By untarring this archive into
~/.icons/ should create a folder called
flags containing all of the files.
Next run in the terminal:
gconftool-2 --type boolean --set /desktop/gnome/peripherals/keyboard/indicator/showFlags "True"
Which will enable keyboard indicator flags.
The tarball mentioned above: flags.tar.bz2
Flag icons for the Faenza icon set: [Default] [Dark Panel]