Comment 2 for bug 30538

The win-key getting treated as a non-modifier key is the most annoying issue. In gconf-editor I can set "<mod4>whatever" to activate it. The Win-Key is accepted as "Super_L", but not recognized as a modifier key (so I can bind a function to "Super_L", but not to i.e. "Super_L+a"

The Undo/Redo keys are used with "Undo" and "Redo" in gconf-editor. Those cause a window to pop up in the GUI, claiming that those keys can not be bound since that would break them for normal typing... They are allowed in conjunction with a modifier key though. "<Shift>Redo" is a valid combination, "Redo" on its own is not.