In the newest snapshot, there's a bug: If you throw a splash potion (I only tried one with night vision), you get a purple-black block (untextured) that you throw.

Maybe other people have entered this bug, but I tought I'd help the world with also doing that.

And also, thanks for adding in the /fill command, that makes it a lot easier to build stuff!

Greetings,
Joshua Moelans