ONLY TESTED IN MAC V1.04
I was playing in a 5 hour world, collecting items, when I fell into my net and got stuck. Of course, the shark killed me. I exited to the main menu, and noticed the save had the word "DEAD" before the name. I went into the save files (~/Library/Application Support/unity.Raft.Raft/SavedGames), and deleted "DEAD". Now the world works normally.