Clarification of coordinate system in <feImage>

The spec is not clear about the coordinate system in effect
inside an <feImage> filter primitive. Please refer to

http://nagoya.apache.org/bugzilla/show_bug.cgi?id=26861
(Batik bug report) for a detailed discussion.

By the way, I'm wondering whether I'm writing to the right
mailing list and this is reaching the right people -- if you
think I should be sending this to someone or something else,
please let me know.

felix.