There is another bug. If you put scaffolding and try to climb on them, then either fall into the texture and takes damage, or you start to climb on them and still take damage.

Yeah, walking into scaffold gives you damage. It also doesn't stack when you left click on more scaffold to the bottom of a tower.

I am testing the left clicking and it works fine for me. You also have to know when he can not place it then it has something todo with that the weight is bad on that side (they act a little bit realistic)

By the way the damage thing is now fixed.
Also added that you climb on Iron Scaffoldings 50% faster. (from 0.2 up to 0.3)

By the way did you know that you can increase the strenght of the Scaffolding (Iron ones with Iron Fences and wooden ones with sticks)?

Indeed I did. Only works when they have a block under them however.