If you put Glass Bottle, Buckets or Cans in a empty Coke Oven Slot (no Creosote inside) it will copy the full stack of the item. So you can duplicated those items very easy. I think this is a bug.
(tested with Forge 1291 and railcraft 9.6.0.0

We're getting that as well.

9f91c4d?

This appears to be a case of the beta testers not doing their job. ;)

Scratch that, I cannot duplicate. Video anyone?

I think they can get a bottle with 1 milibucket? Maybe like that.

Ah, the initial post is incorrect. It does not work when the Coke Oven is empty. There must be some Creosote in it.

Work only with a empty coke oven.

No, it does not...

If there is creosote inside it works well.

Forge 1291

Only happens when there is some fluid in the tank, but not enough to fill a bucket.

Or different version of forge?

Tomorrow I can make a video to prove it if you need.

Not needed. I've duplicated and fixed already.

Thanks for the report. ^^

Maybe tomorrow. Busy tonight and want to wait and see if there are more.

9.6.1.0?

Fixed in 9.6.1.0

Thanks for fixing