[Fluxus] ribbon colour bug?

[Kassen]

Dear list,

Consider;

(clear)
(clear-colour .5)
(define arm
    (build-ribbon 10))

(with-primitive arm
    (hint-none)
    (hint-wire)
    (line-width 3)
    (wire-colour 1)
    (colour (vector 1 0 0))
    (for ((x (in-range 0 (pdata-size))))
        (pdata-set! "p" x (vector (* .1 x) 0 0))))

I would expect this to give me a white line. Instead I get one that's red on
one side and black on the other, creating the odd situation of a line that
has two sides.  This leads me to suspect that (hint-none) isn't working here
and that (wire-colour) isn't either.

This is on the latest Git version (updated two or so days ago with all the
extensions, like the video stuff) and a NVidea 6200 AGP 512MB.

Yours,
Kas.
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