Double-clicking the plants in the 7th floor of the jammer caves does nothing, not allowing you to harvest from them, even with ranks in Gatherer.
Have you tested any others?
I just tried the ore in the iron mine and the plants in the forest, they don't work either. (clicking them does nothing, unless you're not in range, then it'll say you need to be closer).
EDIT: I'm pretty sure this applies to any harvestable node, as shedded scales are also affected by this.
EDIT2: Old Campfires are also unusable.
This should be corrected.