Well, this is getting VERY annoying...

[Taz-in-Space]

There is quite a lot of AI actions that don't
happen. For instance, if the AI sets up colony in one of your systems, just try and ask them to remove the colony. I have often had the AI promise to remove the colony; but NEVER has an AI actually done this. They will often remove a ship from a system if you ask, but never a colony. This is especially annoying when they are your ally - you them must either allow them to stay or declare war on them and attack that colony.