Just dug out my Ignition 3.0 dance pad to bring it t o a friend's place for a "party" tomorrow.
One foam piece was away from the rest of the stack and the pad itself was hidden under my brother's bed. Now the down arrow is folded in 2.
Just tested it on Bad Apple!! (hard), it works correctly enough for the level we'll play. Wouldn't recommend it for anything serious, though.