Anybody else had this problem? I got about half way through the game and after completing a stage, my PS3 got stuck on a load screen (where the bar code fills at the bottom left of the screen) and it just kept going and going. I left it for a few minutes but no progress, so I had to shut off my PS3. When I reloaded the game it gave me the "No save data found, starting new game."!!! The same thing happened a second time last night after I had completed about 3 or 4 missions. Not cool.
Does anyone know if you can make a copy of your save game data? I will try this tonight, and if it works I'll just have to exit the game after every couple of missions and make a copy of my save game until they come out with a patch. Ugh.