If you have patched to 1.42, we advise you to use savegames of version 1.4 (i.e. made in game version 1.4) instead of savegames made in version 1.41.
I hope you haven't played too far in 1.41... Sorry for the inconvenience.
(When you click "Load" in the menu and get the load window, clicking the name of a savegame will show you some information about that savegame. The savegame version will be shown on the right hand side of the load window, just below the screenshot.)