I always wondered, and may have raised it on IRC in the past:
1) whether utilizing GPUs for computations instead of (or in addition to) graphic rendering could speed things up. It's obviously no small effort to convert parts of the code to work on a GPU, but since the team now has experience ...

Disabling station with train waiting in it doesn't force the train to departure anymore so it works as it worked in 0.16. It looked like a useful change for 0.17, but we can control train conditions by circuit network and there are some nice and simple use cases were ruined by trains being forced ...

Other bug reports of the same issue:
viewtopic.php?f=47&t=65988
viewtopic.php?f=47&t=66130
viewtopic.php?f=47&t=66051

Here's my bug report on the issue viewtopic.php?f=7&t=65988

It's because there isn't anything above the entity description. The moment you repair the minimap or go into map mode the problem disappears.

Here's my bug report on the issue viewtopic.php?f=7&t=65988

It's because there isn't anything above the entity description. The moment you repair the minimap or go into map mode the problem disappears.

Edit: This is a scenario only issue, or an issue when there is nothing above the Entity tooltip. See final screenshot.

Edit: Other bug reports about the same issue:
https://forums.factorio.com/viewtopic.php?f=226&t=66051
https://forums.factorio.com/viewtopic.php?f=7&t=66130

As you can see, the ...

The "Find survival supplies in wreckage" objective only has 2 pieces, when there are three pieces of wreckage on the map.

The one on the left is not counted at all.

TL;DR
Replace the vertical lines between train blocks with arrows indicating directions.


What ?
Current block visualisations look like this:
https://eu1.factorio.com/assets/img/blog/fff-198-rail-block-visualisation.png

The only way to see what direction are allowed in a segment of track is ...

Saw this from https://forums.factorio.com/viewtopic.php?f=47&t=55624 .

I am also experiencing this issue. It has happened several times, but only with this splitter in particular. Removing the splitter, and re-placing it seems to fix the problem for several hours.

https://i.imgur.com/ysmFPBT.jpg