Doesn't require a reboot just a logout and log back in.
On my machine Lenovo t61. to recreate, add UK keyboard, delete USA keyboard. logout and back in. USA keyboard now reinstated .
Makes no difference if systemwide settings are used or not.
Natty Beta 2 with all current updates as of 14.10 BST on 21/4/11
Doesn't require a reboot just a logout and log back in.
On my machine Lenovo t61. to recreate, add UK keyboard, delete USA keyboard. logout and back in. USA keyboard now reinstated .
Makes no difference if systemwide settings are used or not.
Natty Beta 2 with all current updates as of 14.10 BST on 21/4/11