Well, if it is a pathfinding issue, I have more coming your way. Note sure this deserves its own thread, so here it comes:
On Silent Isle, there are problems with pathfinding, although of a different nature. In particular, let's say I am in front of the boat, and psi beetles and rathounds are attacking me. Some rathounds go west (towards the psi beetles) instead of coming straight at me, and some psi beetles go back and forth every turn. I am assuming these are pathfinding problems. These problems did not exist in earlier versions of the game (before the summer, when I had last played it).
I have noticed the above behavior repeatedly in two successive playthroughs. This is not such a major problem of course, but here is hoping that pathfinding will be fixed.