Dear Httrack Forum

I've found this great tool, but now i've got a questions I couldn't find an
answer in the forum.

I'm trying to download some pictures while skipping the html and thumbnails.
This works as expected when I include/exclude by name, but it doesn't when I
exclude by size. Example:

Works:
  httrack <http://www.hornywolf.com/galleries/0730/> -g -r2 -p2 "+*.jpg"
"-*thumbnail*.jpg"

Doesn't:
  httrack <http://www.hornywolf.com/galleries/0730/> -g -r2 -p2 "+*.jpg"
-"*.jpg*[<20]"

I get "Error: llink not taken because of its size" with the second example,
but not with the first. Why is that? Is there a way to skip by size while
still following the links?
Cheers
MadMike