We will be rolling out several small fixes mid-day today (Jan 29.) We do not anticipate any disruptions or problems, but f you spot any unexpected issues after 12 noon (PST), please report them in the designated thread in the DG Site Updates forum.
I haven't seen one of these since I was a kid! I don't know exactly what it is, but it's the pupal stage of something - I think it may be a moth. As far as I know, they aren't harmful to anything so I wouldn't get too worked up over it.