Dear all,

This morning I had the chance to look at this on a machine with cairo installed.

There were a couple of problems that were making this happen.

Uwe caught the first already: the convertColor() function was
returning the wrong values.

The second problem was with using the cairoCanvas and a PIL Image
(this is what rdkit.Draw.ShowMol() does): there the pixel order
expected by the PIL Image and that being provided by the cairo canvas
were different, so the red and blue channels were being swapped. I
just checked a fix for both of these into svn.

-greg

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