according to
http://www.pythonware.com/library/pil/handbook/introduction.htm:

"Copying a subrectangle from an image

    box = (100, 100, 400, 400)
    region = im.crop(box)

The region is defined by a 4-tuple, where coordinates are (left, upper,
right, lower). The Python Imaging Library uses a coordinate system with
(0, 0) in the upper left corner. Also note that ****coordinates refer to
positions between the pixels****, so the region in the above example is
exactly 300x300 pixels."

This says to me that coordinates are *exclusive*, so I believe PIL is
behaving correctly in accordance with its docs.

What documentation were you looking at, exactly? It might be helpful to
copy in there explanation that "coordinates refer to positions between
the pixels"

-- 
Image.crop(.) does not work as documented
https://bugs.launchpad.net/bugs/591730
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