A bug: Train teleports away from the depot!

[Dakkus]

Ran into the oddest bug out there. It's a bit hard to explain. When my train goes to the depot, it teleports some 20 squares away. That happens right when the locomotive enters the depot. The cars behind it keep rolling to the depot and when they get there, they teleport, too. I've included the save game file as an attachment here. In case that only save game file isn't enough, I've also included all files I think might be important here in a gzipped tar. (opens with winzip).

You can reproduce the bug by smashing the go to depot and reverse buttons of train 8. Also try letting the train go north by the tracks while the last cars are on the tracks. You see the locomotive pushing the cars a square ahead it just as the train and the cars had a positive magnet in them.