1.0.4.9 A colonization ship tried to colonize an occupied stellar system...

[Florestan]

Yet another problem... If a colony ship is on its way to colonize a planet, and that another empire colonize another of this system's planet first first, your ship doesn't stop nor warn you, an colonize the place anyway. I even prevented one of my ship trying to colonize a world that was already colonized just in time... Maybe I should have let it, just to see what it would have done... I probably would have lost it.

[Canute0]

Maybe I should have let it, just to see what it would have done

You get the msg, Colony ship xyz  has complete his mission. And its just siting before the planet ready to get new orders.

[Phez]

Similar problem - ships kept getting assigned to wait by a planet I intended to colonize.  After another race colonized it the military ships kept showing up and causing me "get your military ships out..." messages.