In article <200302050550.h155oQr01443@megalixir.mit.edu>
gschmidt@mit.edu writes:

> >How-To-Repeat:
> 
> Install the 'screen' package. Start screen. Echo this sequence of
> characters to draw an inverse video horizontal dash: 
>    ^[)0^N^[[7mq^O^[[m
> Switch to a new screen page and back by typing ^Ac^Ap. Observe
> that your prompt has been replaced with line-drawing characters.

This is simply screen's matter.

By default, screen assumes that the terminal does not have ISO2022
style charset handling.
To enable the charset handling, the ``G0'' capability must exist
in the termcap/terminfo.

Since ``G0'' is a non-standard capability, the termcap database shipped
with NetBSD doesn't have ones.  Instead, add a line like this

	termcapinfo xterm*|vt* G0

to your ~/.screenrc file.

Hope this helps.
-- 
ITOH Yasufumi