the train will not obey the 'forbid 90 degree turns' setting. This is

	due to the fact that we can not be sure that the setting was turned

	off when the track was reserved, which means that we assume it was

	turned on and that the setting does not hold at the time. We made it

	this way to allow one to change the setting in-game, but it breaks

	slightly when you are running your train through itself. Running a

	train through means that your network is broken and is thus a user

	error which OpenTTD tries to graciously handle.

	Fixing this bug means that we need to record whether this particular

	setting was turned on or off at the time the reservation was made. This

	means adding quite a bit of data to the savegame for solving an issue

	that is basically an user error. We think it is not worth the effort.

Lost trains ignore (block) exit signals

	If trains are lost they ignore block exit signals, blocking junctions

	with presignals. This is caused because the path finders cannot tell

	where the train needs to go. As such a random direction is chosen at

	each junction. This causes the trains to occasionally to make choices

	that are unwanted from a player's point of view.

	This will not be fixed because lost trains are in almost all cases a

	network problem, e.g. a train can never reach a specific place. This

	makes the impact of fixing the bug enormously small against the

	amount of work needed to write a system that prevents the lost trains

	from taking the wrong direction.