Ctrl+U for Evaluate Expression does not work in Eclipse key mapping

Although Ctrl+U is listed in the menu item and in the key mapping for Eclipse it does not show the Evaluate Expression dialog. It appears Ctrl+U is already used. I changed the mapping to Ctrl + Alt + Y and it works like a champ. The default key mapping should be changed to something that is not in conflict with [Main Menu | Navigate | Super Method] [Main menu | View | Swap Panels]