I’ve gotten a few emails from users over the past week complaining that the original Midnight Mansion, and Midnight Mansion 2: The Haunted Hills, have suddenly started freezing when opening a custom mansion or saved game, or jumping on a save pedestal within the game. Also, the Level Builder would not start up.
These problems were all due to a software update for OS X 10.6.8 that Apple released about a week ago. Fortunately, they have even more recently released a Security Update that fixes the problem the introduced earlier.
So, if you have any of these issues, go to Software Update in your Apple menu, and get the latest updates, and all will be well again!
Midnight Mansion HD was not effected by these issues.