(p.s this is for all 1.8 snapshots)

I was going to the world border by /tp 3,000,000 100 3,000,000 then doing /tp ~26,999,950 ~100 ~26,999,950 and then, just for fun I teleported out of the world border. Quite surprised that it actually worked.

I had a custom world that only generated mushroom biomes and when the server closed after going outside those void chunks I was able to reload, when I did I was on the block next to the void chunks.

I could not find the screenshot on my computer. But it shows me standing on the chunk outside the worldborder

To recreate this issue simply teleport outside the worldborder with a enderpearl