See following thread: http://mail-archives.apache.org/mod_mbox/xmlgraphics-fop-dev/201006.mbox/%3C4C248E07.1070900@gmail.com%3E When optimization mode is off, no "%%DocumentNeededResources: (atend)" comment is created in the header section whereas in some cases it may be necessary. It may be preferable to always generate it even if there is no matching comment in the %%Trailer section rather than the other way around.
resetting P2 open bugs to P3 pending further review