That's most likely unrelated. It means the file system is corrupted (when the kernel detects that it remounts it read-only as a precaution to avoid damaging it further).

There are many ways this can happen, like mounting on another computer via USB and unplugging without unmounting cleanly, unclean shutdown (removing the battery, or running out of battery suddenly) and so on. It may also be bug 2940 if you're one of the unlucky first buyers (though you would probably have noticed years ago), so check for that first.

Otherwise you should unmount the filesystem and repair it with dosfsck, it should be fine after that.