Trees appearing on the edge of the island can't be cut down.

[Vulturas 10]

If a tree happens to spawn on the very edge of the island, you cannot cut it down, usually it's somewhat in the water and can't be cut down. I think this is an issue that has been here for some time.Clicking the tree will merely make you go near it.Also, pigmen consider this tree a tree, thus they go near it when you commence to cut down a tree nearby.

Edited September 20, 2012 by Vulturas

[Excess 55]

Yep, this is a well-known (and posted) bug. It happens with everything, trees, grass, branches, rocks, etc.