I am using WinHTTrack Website Copier 3.23 (+swf).

If for certain sites and images, HTTrack doesn't follow 
precisely the prescribed access path from the originating 
webpage, I am left with a 1 KB junk JPG file that 
corresponds to "Forbidden Access."  Apparently, HTTrack is 
accessing directly, which is not permitted for certain 
sites.  Is there an option that I might set to correct this 
situation? 

Alternatively, what may be occurring is that the file is not 
a JPG file but an HTM file with a pointer to an image.  In 
either event, it appears to be an HTTrack accesss problem.