I got a Carrion Amulet (level 75 – 47power, 47vitality, 66 condition damage, green masterwork) from the chest in the Hidden Garden jumping puzzle and it is already soulbound and also unsalvageable. I remember having this problem before with this amulet as a random drop as well.
There should be no reason for this item to be soulbound on acquire or unsalvageable.
