"home" and "end" keys changed - not always" into "tilde"

[Leonardo Tasso <leonardo@tasso.info>]

hi,
I have a 80% woody 15 % sarge 5 % unknown debian.
since an undefined time and event I have to tackle with a strange keyboard behaviour.

this is what happens when I write something at shell prompt 
(this is the prompt:    andrea@dragon # >      )
(the asterisk is cursor position       someblahblah*    )



when cursor is at the end of the row, that is
andrea@dragon # > someblahblah*

if I push "home" instead of
andrea@dragon # > *someblahblah

I get
andrea@dragon # > someblahblah~*



then if the cursor it at the beginning of the row
andrea@dragon # > *someblahblah

if I push "end" instead of 
andrea@dragon # > someblahblah*

I get 
andrea@dragon # > ~*someblahblah



an so on if I am in the middle of the row with the cursor.



These things do happen also with pico editor but do NOT with vi editor or the netscape navigation toolbar.
To be in Xwindows or in console (not graphics) does not change anything, so the problems should not be related to
X.


Any clue ?

Thanks and bye

Andrea