1. Make a box out of solid WALL (about 20x20) and replace the top with LIQUID WALL.
2. Put SEED (from the life tab) into the box so that it expands to fill it.
3. With a large cursor, dump MERC into the top of the box so that it smothers what's inside.
4. After dumping MERC in, press Ctrl + Z (Undo).
5. You will notice that the life will be frozen for about a second or so, then go back to normal.
Is this a bug, or did I just break the algorithm that solves GOL? Or, does it just need time to figure out what state each LIFE pixel should be?