I have been using Klipper as my clipboard manager and it was quiet flexible to use it's pop-up menu shortcut. But in ubuntu 10.10 it seems that there is no shortcut key to trigger the klipper popup menu.
Is there anyway to enable the popup menu shortcut for klipper?.
Open the klipper pop-up menu with your mouse, go to 'Configure Klipper' go to Advanced and then Shortcut Options. You should be able to configure/re-configure the shortcut key in here. If this fails, then the Desktop Environment mught be overriding that key combination for a different function.
https://help.ubuntu.com/community/Klipper
Hope this helps, Bodsda
Looks like a known bug with no workaround for GNOME: https://bugs.kde.org/show_bug.cgi?id=244620
if you are using KDE, you have to specify the shortcut in system tray settings (instead of in the klipper global shortcuts). See https://bugs.kde.org/show_bug.cgi?id=244620#c41
Have you thought about switching to Parcellite, which is good integrated in Gnome?