I have just come across this problem recently.  I am mirroring a large intranet
site (via commandline) where most of the images are in the /img/ directory.

Here is the command I am using:
httrack <http://intranetsite/> -O "C:\Documents and
Settings\Username\Desktop\HTTrack\Website" -F "HTTrack/3.0x" -A500000
-#L500000 -%s -n -t -p7 -%l "en, *" -%w -%u -o0 -q -s0 -I0 -H0 -f2 -%f0 -#f
+*.png +*.gif +*.jpg +*.css +*.js -*.exe -*.zip

A mirror of the site in January worked just fine, and since then I updated to
the latest HTTrack version (I think).  Now, when I try spidering the site, I
get the following problem:

As the mirror is being built, *all* the images are saved properly in the local
/img/ directory.  I have it open in thumbnail view to make sure.  *Just*
before the mirror completes (maybe 5-10 seconds before) about 10% of the
images are randomly replaced with files of the same name, but containing an
HTTP 416 error message in HTML.  "416 Requested Range Not Satisfiable"

There is no rhyme or reason as to which images get replaced.  Some are png,
some are jpg, and they change between each mirror.

I have tried swapping out several of the commandline arguments in the command
above, without success.  Can you tell me what event occurs close to the end of
the mirror which would cause this, and what I can do to disable it?
Thanks very much!

Brian