Are you in fact using a KDE konsole terminal window?
If you go to Settings -> Edit current profile -> Keyboard, is it set to
Default (xfree 4)?
If you do: cat -v -
in the window, and press F3, do you get ^[OR (i.e. ESC O R)?
If the first two are yes and the last is no, I think you'll have to go to
KDE System Settings and fiddle with the Input Devices / Keyboard
settings to get your keyboard to send the right thing. Or, you could
edit your local $II_SYSTEM/ingres/files/termcap file to change
the konsole k3 parameter to whatever your keyboard is actually sending.