Well this happens sometimes. do you have an 8mb sony memory card, or is it a 16mb third party memory card becuase this game has trouble with third party memory cards. I think its just square enix way of punishing the people who are un-faithful to sony. XD
i had the same problem with Genji. but im not sure why it is doing that. Um do you have more that one memory card. and does this only happen with temp saves? if you can copy all of your data on your card or ur friends card then format the memory card you're having problems with, then put your data back on it might work. if this is no help just save up to buy a official "Sony" memcard. cause nyko is still third party card
It happened to me too awhile back. Hell, it's always happened to me at some point. I still don't know what causes it, as it just happens at some point.
Although it does not effect the campaign, it does not allow your inventory to carry over to the extra missions. Which is VERY crippling, as you're stuck with a regular Cerberus, and a scope or two that weren't in the campaign.
probably something to do with the fact that you're not using the official 8 mb sony memory card. i don't care if it has the seal or whatever. there's probably something slightly different which caused the file to be corrupt.