I think you're probably right that this is that bug's fix. Whether or not it's intended behavior, it struck me as weird (why have a placement range limit if I can actually place belts outside that limit, but can't remove those belts that I just placed...). Figured I'd be a good citizen and report it...

With "Lock belt building to straight line" and "Smart belt dragging" turned off , I'm able to manually place belts outside my normal placement range by attempting to place the belt far away, holding down the placement button, and dragging my cursor into my placement range. As soo...

If I had more space in the Subject I would have called it "Column dividers in the Mod screen don't terminate properly when you've used the search box," as that seems to be the extent of the problem. Some pictures: http://i.imgur.com/usuazwn.jpg This image shows what I'm talking about. The ...