Kernel 3.6.2, which is only in current, has an ext4 data corruption bug.
It was only recently discovered, and was not found by routine testing on
our end. Upstream is working on a resolution, which will be pushed out to
current as soon as they have an official fix that has made it into a new
patch level. The bug is rare, and is reported to manifest only during two
or more successive reboots in rapid succession. If the information is
accurate, you should be fine if you are try to avoid this. But backup
of important data is still the best option. For full information, please
read the original source here:
http://www.phoronix.com/scan.php?page=news_item&px=MTIxNDQ