First of all, this is not famous problem, which solves by unchecking "Allow to control the pointer using the keyboard".
My numpad navigation does not work in console under X. Nor in Konsole/KDE/Kubuntu (9.10), nor in Console/Gnome/Ubuntu (9.04).
It works in graphics applications. It works in system console in text mode (Ctrl+Alt+F1..6) too.
But in Konsole I can't navigate cursor by numpad arrows in Midnight Commander or text editors. When NumLock is on - the numbers are typed. But when it off, nothing happens - cursor doesn't move. The same reaction from Home/End/PgUp/PgDn keys on numpad.
I hate navigating in text console by arrows between mainpad and numpad!