Is it a common thing for some files to get corrupted in the MMC? This is happening for a few files. The card is a new NCP 512 mb. If i try to open a particular game, it gives an error that it can't open and sometimes even the .sis installer file will get corrupted. I scaned the MMC for errors in the card reader through Fixit utilities and Norton disk doctor, it says the "Directory Structure" and "Free space" has been fixed...there are no Disk read errors. Inspite of doing all these, i still get an error every now and then. Should i replace the MMC or is this a known problem? btw, i have also formatted the card twise so far.