As previous posters have pointed out, there's little that can be done about human players having similar colours, since many people are used to "their" colour and have a strong preference for using it. However, this does not apply to the AI, so it can be given any colour at all. Smart assignment of AI colours would prevent games like this...:
Actually Moros, I think it's nice that this thread was saved from deletion; it's a good suggestion. Besides, if people are suddenly only allowed to reply to forum threads they actually can contribute something valuable to, this is going to be a very, very quiet place ("this" being the Internet, not just the WL forums :p ).