The following reply was made to PR kern/34129; it has been noted by GNATS.

From: gson@gson.org (Andreas Gustafsson)
To: gnats-bugs@NetBSD.org
Cc: 
Subject: Re: kern/34129: Nonblocking write to pty returns 0, not EAGAIN
Date: Thu, 3 Aug 2006 22:39:47 +0300

 David Laight wrote:
 >  Is that what causes the display to scroll up during the progress bars?
 
 I haven't seen that happening; that sounds like a different issue.
 
 The corruption I see is that the text that would go in the bottom
 third or so of the screen is discarded, causing that part to be left
 blank, or if the discarded portion begins inside a stretch of
 line-drawing characters, the terminal gets left in line-drawing mode.
 -- 
 Andreas Gustafsson, gson@gson.org