I don't know why but this option has never worked (in 3.09) and does not work
in current release (3.22).  In 3.09 I programmed it myself to just look at the
extention to the file but ideal thing would be to look at the image tags in
the referring html.  For a simple site such as www.google.com I used the
following options for version 3.22:

httrack www.google.com -O /tmp +*.gif +*.jpg +*.png +*.css +*.js --depth=1
--quiet --near --http10 --clean --tolerant -eBX

but this only gets the index.html and not the images such as logo.gif  Could
somebody shed light on this matter.  Thank you for your help