The color can't stay on 1.0 (e.g: the green in the image isn't at 1.0, but 0.9999...)
Thanks Timrael! This is a known bug, and it's on the log to be fixed.
Ok, maybe there should be a ticketing tool (not the forum, a real ticketing tool) so that everyone (registered CORE ?) can access it.
Yes! There's a ticketing support portal here (Manticore Games) for anyone can use for non-creation help issues.