You can turn on turbo mode by starting a new game in ludicrous mode and then, when you see the screen where it says lives and level and that, click Back. You'll still have it during the rest of the game until you quit. If you quit Gish and load it up again and continue your current game, turbo mode isn't on
Hey, what a cool bug, that might make it a bit easier
You finally found it? I never got around reporting it...