It's all ok before upgraded from 10.04 to 12.04.
It seems all right. In keyboard shortcut window, if I pressed Win+V, it can capture the key combination as
Super+V, no problem. I've checked the output from
xev utility, the left and right Win keys are translated to
I have found a workaround, though. Using gconf-editor, edit the entries
/desktop/gnome/keybindings/*/binding and replace
<Mod4> for the problem bindings.
Super+... keys do work for most built-in actions such as "switch workspace", they just don't work for custom commands.