I'm having difficulties downloading some images on a website.

The images in question are producing a "engine: warning: entry cleaned up, but
no trace on heap" in the hts-log file.  The images are downloaded but often
corrupted.  Out of 25742 files only five images produce this warning.  Web
browsers and an much older version of httrack don't seem to have any problems
with these images.

I've included the start of the log file below.  Does anyone have any idea what
is causing the issue?
Starting at 18/11/2008 18:26:14.71
HTTrack3.43+htsswf+htsjava launched on Tue, 18 Nov 2008 18:26:16 at
<http://wey.cabsrv.org.uk:82/> -* +http://wey.cabsrv.org.uk:82/* -*/print/*
-*/contrast/*

("C:\Program Files\winhttrack\httrack" <http://wey.cabsrv.org.uk:82/> -O "C:\My
Web Sites\advisernet\20081118 182607" -A2000000c32R5L0x -F "Web Site
Downloader" -q -v -%! -* +http://wey.cabsrv.org.uk:82/* -*/print/*
-*/contrast/* )

Information, Warnings and Errors reported for this mirror:
note:    the hts-log.txt file, and hts-cache folder, may contain sensitive
information, such as username/password authentication for websites mirrored in
this project do not share these files/folders if you want these information to
remain private

Mirror launched on Tue, 18 Nov 2008 18:26:16 by HTTrack Website
Copier/3.43+htsswf+htsjava [XR&CO'2008]

18:26:16    Warning:     * security warning: !!! BYPASSING SECURITY LIMITS -
MONITOR THIS SESSION WITH EXTREME CARE !!!

18:26:16    Warning:     File has moved from wey.cabsrv.org.uk:82/robots.txt
to <http://wey.cabsrv.org.uk:82/notfound.htm>

18:26:31    Info:     engine: warning: entry cleaned up, but no trace on heap:
wey.cabsrv.org.uk:82/blacknav.gif (C:/My Web Sites/advisernet/20081118
182607/WEY_CAB/BLACKNAV.GIF)

18:29:48    Error:     "Not Found" (404) at link
wey.cabsrv.org.uk:82/blacknav.gif (from wey.cabsrv.org.uk:82/default.css)

18:29:53    Info:     engine: warning: entry cleaned up, but no trace on heap:
wey.cabsrv.org.uk:82/help_tip.gif (C:/My Web Sites/advisernet/20081118
182607/WEY_CAB/HELP_TIP.GIF)

18:33:06    Info:     engine: warning: entry cleaned up, but no trace on heap:
wey.cabsrv.org.uk:82/w/blacknav.gif (C:/My Web Sites/advisernet/20081118
182607/WEY_CAB/W/BLACKNAV.GIF)

18:53:11    Info:     engine: warning: entry cleaned up, but no trace on heap:
wey.cabsrv.org.uk:82/arrow.gif (C:/My Web Sites/advisernet/20081118
182607/WEY_CAB/ARROW.GIF)

18:53:20    Info:     engine: warning: entry cleaned up, but no trace on heap:
wey.cabsrv.org.uk:82/close.gif (C:/My Web Sites/advisernet/20081118
182607/WEY_CAB/CLOSE.GIF)

18:53:24    Error:     "Not Found" (404) at link
wey.cabsrv.org.uk:82/help_tip.gif (from
wey.cabsrv.org.uk:82/index/help/help_ewsni_weekly_tips.htm)

18:53:33    Info:     engine: warning: entry cleaned up, but no trace on heap:
wey.cabsrv.org.uk:82/s/help_tip.gif (C:/My Web Sites/advisernet/20081118
182607/WEY_CAB/S/HELP_TIP.GIF)

19:11:43    Info:     engine: warning: entry cleaned up, but no trace on heap:
wey.cabsrv.org.uk:82/s/top_right.gif (C:/My Web Sites/advisernet/20081118
182607/WEY_CAB/S/TOP_RIGH.GIF)

19:12:06    Error:     "Not Found" (404) at link
wey.cabsrv.org.uk:82/w/blacknav.gif (from wey.cabsrv.org.uk:82/w/default.css)

19:12:12    Info:     engine: warning: entry cleaned up, but no trace on heap:
wey.cabsrv.org.uk:82/w/help_tip2.gif (C:/My Web Sites/advisernet/20081118
182607/WEY_CAB/W/HELP_T-2.GIF)