When I have two or more keyboard layouts, there is a keyboard icon in the tray, along with an indication of which layout is active. When I have only one layout, those icons disappear.
When the icons are there, the keyboard layout does not affect shortcuts. I can use Dvorak or Russian and still do ctrl+c/v. When the icons are not there, I need to press ctrl+[key that maps to c/v under the active layout] to copy/paste. While this could be useful in certain cases, it is very inconvenient with languages that don't have c or v, like Russian.
1) Ubuntu 12.04.1 LTS (using gnome-fallback, in case it matters)
2) I don't know which package is responsible.
3) When I have only one layout (in System Tools -> System Settings -> Keyboard Layout -> Layouts), shortcuts should remain unchanged (i.e. the same as they would be in the US layout), no matter which the layout is.
4) Shortcuts change according to the active layout.
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