> I've tried the generate-errors switch (-o0 or "set
> generate-errors=0" in the httrackrc file) and they
> still show up.
> 
> Does this have something to do with the late
> practice of web servers returning highly formatted
> 404 pages?  Like this site...

But when I mirrored that link I got:
Info:  engine: save-name: local name: www.yahoodrummers.com/doesnotexist.htm
-> www.yahoodrummers.com/doesnotexist.htm
Info:  engine: transfer-status: link error (404, 'Not Found'):
www.yahoodrummers.com/doesnotexist.htm
Debug:  redirect to www.yahoodrummers.com/doesnotexist.htm
Debug:  File checked by cache: www.yahoodrummers.com
Debug:  Cached fast-header response: www.yahoodrummers.com/doesnotexist.htm is
404

(winhttrack -qwr2C2%Pns2u1Z%s%uN0%I0p3DaK0c4H0%kf2%f#f -F "Mozilla/4.0
(compatible; MSIE 6.0; Windows NT 5.0)" -%F "<!-- Mirrored from %s%s by
HTTrack Website Copier/3.x [XR&CO'2010], %s -->" -%l "en, en, *"
<http://www.yahoodrummers.com/doesnotexist.htm> -O1
C:\Users\Bill\_internetDLed\test )