Problem with filtering - apparently inconsistent results.
Using any of the filters below:
      -*.JPG  +*.L.JPG
      -*  +.L.JPG
      and many other variations

If I put one URL in the URL list, the download inlcudes only 
JPG files with ".L" in them.
If I put two or more URLs in the URL list, the download 
includes all .JPG files, regardless of file name structure.

STRUCTURE OF THE SITE I AM ACCESSING
Picture gallery web site has thumbnail pages and "full size" 
pages (html)
Each thumbnail page has 6 to 20 pictures, hotlinked to the 
full size images. 
Thumbnail images all have the same simple structure: 
00NN.JPG, where NN = 00, 01, 02 etc.
Larger images all have the same simple structure: 
00NN.Big.JPG
All the html and JPG files (thumbs and big) for one gallery 
are stored in one directory.

Web site has structure as follows. 
<http://common/stuff/>
   <http://common/stuff/gallery1/>
      <http://common/stuff/gallery1/thumb1.html>
          THIS PAGE CONTAINS pictures 0001.JPG, 
0002.JPG and 0003.JPG
          0001.JPG links to big1.html in same directory
          0002.JPG links to big2.html in same directory
          0003.JPG links to big3.html in same directory
      <http://common/stuff/gallery1/thumb2.html>
          THIS PAGE CONTAINS pictures 0004.JPG, 
0005.JPG and 0006.JPG
          0004.JPG, 0005.JPG and 0006.JPG link to big4.html, 
big5.html and big6.html
      <http://common/stuff/gallery1/thumb3.html>
          THIS PAGE CONTAINS pictures 0007.JPG, 
0008.JPG and 0009.JPG
      ...
      <http://common/stuff/gallery1/big1.html>
          THIS PAGE CONTAINS picture 0001.Big.JPG
      <http://common/stuff/gallery1/big2.html>
          THIS PAGE CONTAINS picture 0002.Big.JPG
      <http://common/stuff/gallery1/big3.html>
          THIS PAGE CONTAINS picture 0003.Big.JPG

   <http://commonstuff/gallery2>
      Gallery 2 has identical structure to gallery 1 (including file 
names)

   etc. etc. through gallery 100