If you are building a slab decking, say, and you hold SHIFT and walk backwards to the edge, looking down. You correctly fail to fall off. If you then place a slab on top of the slab you're standing on, turning it into a full block, you fall off immediately. It's really easy to do this when trying to build and one falls off quite often.
Environment
Windows 7
Comments 5
You can place a slab on a slab when standing on it, so long as you:
Hold shift to enter sneak mode, while standing on the slab
Walk backwards as far as possible - it's almost like you're floating in space off the edge of the slab
Place another slab - you will find that you move backwards a bit and fall off the new slab
This is not usually dangerous, but in my case I was building a jetty and continually fell into the water, which was annoying.
Hmm, ok I just fired up 1.4.7 and - I can't reproduce it either! It must have been fixed in one of the recent minor versions?
Unable to reproduce as unable to place a slab ontop of slab when standig on it.