So, with ZTD coming out, I know we have a lot of people running through 999 and VLR for the first time in preparation.
If you happen to get Virtue's Last Reward on the 3DS, DO NOT, I repeat, DO NOT save in the puzzle rooms. There is a save corruption bug, which I believe may have been fixed in the eShop version of VLR, but I am not 100% certain.
This bug does not occur when saving during the story sequences, nor does it exist on the Vita version of the game.
I own the 3DS version, and have never once experienced save corruption in two complete playthroughs of the game. Follow this advice, and you'll be fine.
Good luck!
Edit: and for the love of god don't play VLR before 999.
If you happen to get Virtue's Last Reward on the 3DS, DO NOT, I repeat, DO NOT save in the puzzle rooms. There is a save corruption bug, which I believe may have been fixed in the eShop version of VLR, but I am not 100% certain.
This bug does not occur when saving during the story sequences, nor does it exist on the Vita version of the game.
I own the 3DS version, and have never once experienced save corruption in two complete playthroughs of the game. Follow this advice, and you'll be fine.
Good luck!
Seek a way out!
Edit: and for the love of god don't play VLR before 999.