I only know that the mailbox is still having issues, as some of the items you place in will not be recoverable, so it's probably related in some way. Items in question I've noticed that can't be recovered are posters that have been assigned an image, drive boxes, and the metal detector. I believe the reason for this is because the newest version has catalogued, requests, and loads items differently than the previous version, in due part to affected items either having changes done to them or simply because they were sorted elsewhere in the games assets. I'm only venturing a guess because attempting to load a ver 0.8 save without resetting anything yields...uh, something interesting.
Wasn't aware of the pipebomb thing. However, if I were to make a suggestion for [[cat]], you'll notice he shorts out for a moment between stages. It'd be a real shame if he somehow ended up in a furnace during that momentary departure from our corporeal realm...