Weird thing happened yesterday. It was me vs Drengin, and there was a minor race sitting around (I think it was the Carinoids.) caught up in the crossfire. Well, I had a significant tech lead over the Drengin, but my economy wasn't doing very well (It was negative, in fact.), so I built a hugely powerful ship, one which could handle itself against pretty much anything they had, and traded it to the minor race. Now, they did make use of it, but at first they just had it going along a couple of tiles on my border. It was almost like they had a destination, but couldn't figure out the pathing and got stuck in a loop. I suspect, though, that they were patrolling, because a few turns later they stuck the thing in a fleet and proceeded to kick the crap out of half the Drengin navy.
I've had the thing where they don't move the ships happen a few times, too, which I would figure is to do with range. Hopefully that'll get fixed so they can head back into usable range.