Maybe just because it would look strange in the new fuel types tooltip GUI that is shown when you hover a fuel slot?

In the new tutorial, one of the objectives is "Feed Iron plates into the Feeder 0/50", but the entity where you have to feed the pates into is called "Loader" according to its tool tip.
This might confuse new players, but at least it's a nomenclature inconsistency.

"Universal Paperclips"
http://www.decisionproblem.com/paperclips

Imagine Factorio as text-adventure...

PS: Don't click on that link if you are currently at work!

Oops, sorry.
Maybe getting some sleep between Factorio sessions might not be as overrated as they say...

In the attached savegame, I dropped a new train and tried to fuel it via Requester Chest / Inserter. However, as soon as the Inserter drops some fuel into the Locomotive, it instantly vanishes (flashes for ~1 tick in the fuel slot) and the train keeps showing "Out of Fuel". To reprroduce, ...

You build 10 requester chests → Tutorial that copy paste from assembler to requester chest does exactly what you need.

Woooot!!?!
I have > 200 hours on the clock and I didn't know this!

Just announced, hitting Early Access in October, from the creator of SpaceChem, Infinifactory and TIS-100:
http://www.zachtronics.com/shenzhen-io/

Looks like the right thing if the Circuit Network is your favorite part of Factorio...

First impression: OMG! Someone combined SpaceChem and OpenTTD!! Must Buy!

You could create a blueprint with just one curved rail piece in it. That way, you can still place single curved rails at arbitrary places like before.

When setting the Personal Logistics Slot filter (also requester chests), the two entities "Personal laser defense" and "Discharge defense" seem to have wrong localisation keys(?) and are both displayed as "entity-name.laser-bubble", see screenshot: unknown-key.jpg Howev...

While riding an automatic train, I passed by two "trainspitters" (not to be confused with trainsp o tters ) sitting right next to the track who immediately decided to spit on me. Their acid projectiles followed the train for a really long distance (like two or three screens) until they fin...