Comment # 94 on bug 1054448 from Dr. Werner Fink

(In reply to Wolfgang Bauer from comment #93)
> (In reply to Tad Bilby from comment #90)
> > No.  xterm properly "back spaces".  koi8rxterm also works properly.  The
> > problem is related to konsole.
> 
> Note that konsole uses TERM=xterm-256color by default, while xterm uses
> TERM=xterm.
> According to some mails on the opensuse-factory mailing list, the current
> problems seem to be reproducible in xterm too by setting TERM=xterm-256color.

If konsole claims to be XTerm compatible and it is not then this is a bug of
konsole and not from ncurses nor XTerm^[1].  There exists an TERMINFO entry
konsole-256color ... beside this I do not see how konsole uses ncurses
at all

  shell> ldd /usr/bin/konsole | grep -E 'lib(ncurses|tinfo|panel|form)'
  shell> ldd /usr/bin/xterm | grep -E 'lib(ncurses|tinfo|panel|form)'
                libtinfo.so.6 => /lib64/libtinfo.so.6 (0x00007f65f3f9e000)

don't know if konsole tries to read features from TERMINFO entries but if and
as the API and the format of the terminfo entries are changed with latest
ncurses I'd like to recomment to use at least libtinfo.so.6.1 as otherwise
things will not work.

[1]Otherwise it would be never possible to develop new features for XTerm
supported by the TERMINFO entry xterm or xterm-256color