Don't know how I've managed to go so long before making this mistake, but I forgot to visit Yossarian wearing an army outfit, and thus didn't get the magnet. However, the helper helpfully told me where to go to continue the quest, even though I couldn't progress it.
Any chance that the helper message could be "Visit Yossarian wearing a Hippy or Frat War Outfit" if you don't have the Magnet, rather than telling you the first gremlin quest location?
Any chance that the helper message could be "Visit Yossarian wearing a Hippy or Frat War Outfit" if you don't have the Magnet, rather than telling you the first gremlin quest location?