Some keys are not properly recognized in Konsole/xterm

[frank]

> This does not really explain why the default key bindings were switched
> from Ctrl+PgUp and Ctrl+PgDown that I've been using unconsciously for
> quite a long time at all.

Quite correct and quite oblivious of reality.

It must be at least 10 years that editors have standardised on 
Ctrl-Home and Ctrl-End to move to begin resp. end of buffer.

And please be sure you do not mention vim, emacs and the crowd from 
the Linux text console.