[1.4.3] Slazish Fens trees are all undiggable

[Zeyphor]

I went there recently and I managed to find a pickaxe off of one of the nagas; I then tried to do some digging with it, but nothing happened

the trees all do say diggable when I mouse over them, so I should be able to dig em

I spoke to stunt and he said that they aren't properly defined