I see you're getting no response on this.
I got no response either, when I reported the issue four years ago...
(
http://news.povray.org/povray.general/message/%3C3e711afb%241%40news.povray.org%3E/#%3C3e711afb%241%40news.povray.org%3E
)
Rune
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http://runevision.com