xev shows my laptop's down-arrow is "down" (I checked )

jEmplode (the 3/30 jar, as well as at least 1 previous one) claims I can move an item down with ctrl-down. Right-clicking and "move down" works correctly. ctrl-down moves the "highlight" down to the next item, instead of moving the highlighted item down.

I have this idea that the JVM is what's screwing me. Any confirms/denials?