terminal psql: wrong console keystrokes

Through Konsole, the Up, Down, Left, Right keys work properly, but through
psql the keystrokes seem to be wrong:
instead of up (for scrolling in the internel buffer) it appears ^[[A
Down ^[[B
Right ^[[C
Left ^[[D
Back_del (ok)
Forward_del ^[[3~

It happened when I upgraded Mandrake from 7.1 to 7.2 (Linux 2.2.17-21mdksmp
i686), postgresql 7.0.2 from Mandrake RPM.
Where should I look at? I tried the following keyboard settings:
Linux console, xterm, vt100, vt420pc
but no-one works properly.

thanks!