So, I figured it was related to the optimizations described in https://factorio.com/blog/post/fff-176 where placing the new belt segment causes it to rebuild the datastructures that keep track of runs of belts and that somehow makes it pop out. I can't think of any other thing where adding stuff beh...

Preparation steps: Create a loop of belts with a priority splitter prioritizing back onto the belt. Saturate one lane with items. To trigger the issue: Place one belt segment behind the splitter. Expected behavior: items keep circulating with no items getting output on the unprioritized side. Actual...

Disabling the sulfuric acid requirement for infinite ores disables it even for ores that normally require fluid, like Uranium.

I patched it myself.

https://dl.dropboxusercontent.com/u/612 ... ed12.x.zip