Fantastic Game, but BIG inconvenience

I was grinding through all the missions this morning and I had just beaten "Salvatores called a meeting" when the app crashed. I re-opened it, and all my save files were gone. Please fix this, Rockstar. I legitimately enjoy your games, but things like this are a bit discouraging. I will do the missions over again, but this is a real problem, so please fix it. Thank you.

AngryNerdinc. about Grand Theft Auto III