I was moving fibers from my inventory to a nearly full chest when I notices that as I am holding the fiber over the slot it displays something like: "Plant Fibres, quality 72" but when I clicked to put it into the chest it displayed "Plant Fibres, quality 51". This was weird, to say the least, but when I move the pointer a small amount, the display reverts to the correct one. This only works when moving from inventory to the chest, and I believe that what is happening is that the display is showing the wrong item, for instance, one time I did this with fibers and the display showed "Stone axe . . ." (which I had in the chest). I am talking about the written display, not the graphical one.
I guess this is a trivial error, but weird.