I have no idea if others have posted about any of these since the forums don't have a search feature, but here it goes.
v0.0.9e
I had pre-made the 3 different types of wood shield bases (tower, round, and heater shield). After a few in-game days, the game froze and I was forced to force quit it with Task Manager. After starting the game back up, I was unable to attach any shield parts to those base shields I pre-made before the freeze. Making new shields still work.
When I finally got enough money to get a tin pickaxe, I was unable to hammer any tin ingots that I mined and smelted myself. Reopening the game did fix this though.