Hi, could you describe the problem in a bit more detail? You get an error every time you try to save, or when you load? Where in the game are you saving/loading? And if you could, could you take a screenshot of the error that pops up? Because I use a Mac and I can't seem to find any issues with saving or loading in the latest version... I'm sorry for the trouble you're having!
edit: Also, is the error occurring when you try to load a save file from a version before 1.0b?