Seems to be a duplicate of bug 645449 (reported on Maverick)
At least the symptoms are the same: the two frames in the keyboard layout selection screen get out of sync and prevent ubiquity from advancing the dialog.
Seems to be a duplicate of bug 645449 (reported on Maverick)
At least the symptoms are the same: the two frames in the keyboard layout selection screen get out of sync and prevent ubiquity from advancing the dialog.