Hello, I think I found another bug. Since I had problems getting my rock forge to work I decided to update to the newest build and just copy my save over. Aside from spawning some error messages (the red on black kind) it mostly worked, until I tried to deconstruct some furniture and carry the planks somewhere else. I have several backpacks which should easily accomodate multiple planks, yet whenever I try it only lets me wield a plank to carry it, and if i want to pick up any others I have to drop the first one first. i did not test it with many other items, but it is the same for wooden panels, whereas metal sheets stack just fine for me.
Version: 0.E-3407-g845884a (run on Win XP)
This bug can be reproduced: create a new character in a new world, spawn a crowbar, spawn a big backpack (I tried with military backpack and makeshift sling so far), wear it, bash some furniture, try to pick up more than one plank.
Edit: Meh, I guess I found the answer, as usual only AFTER I posted it.
addresses this issue apparently.