Factorio Forums

Look at this Screenshot? What do you see? Right, there is nothing wrong with it. But there are several movement collisions there.

The white marked dots are blocked squares. There are few morem but its hard to search them because the debug function dont give informations about it.

Download the savegame and try it by yourself

Thanks for the report!
This is caused by the tile corrections algorithm not updating the tile collision masks (It will get auto fixed when you save/load the game).
Fixed for 0.8.3.