Comment 138 for bug 453579

"Improperly rebooting runs the risk of breaking your system on *any* filesystem."
Sorry, but this is not true imho. I have never had a similar problem with ext3. Yes, there are some file systems like XFS which just deletes the data of a whole file if the computer crashes or is restarted but I guess the goal should be especially with a journaling file system to prevent errors like this. Not to mention that the size of the file is zero with XFS so you don't assume that everything is fine.
Like I said there is no problem that after a hard reboot some shortly changed data is lost but this has to be diagnosed and dealt with through the file system so that no corrupt files are saved without even realizing it.