Ok, I have submitted a specific bug report about this, but I have a situation where a player has a fleet orbiting the star in my system that I cannot attack. I move my fleet to the same orbit, both fleets are listed in the side menu when it arrives, but when I order an attack, nothing happens. I also cannot attack this player's probe orbiting my colony.

I hope this can be sorted out quickly, because if combat isn't working correctly it undermines a large portion of the game.

Thanks.