It's all very well people ranting on about Posix allows this that and other ect but the fact of the matter is yet again the Linux community is having ALPHA quality pushed on it as distro ready . The very best thing would be for people to STOP using EXT4 completely and if their distro tries to force EXT4 then simply change distro there are enough out there to choose from .
Me personally i gave up on the entire EXT* filesystem some years ago and will NEVER go back you can slag Reiserfs off all you want but it beats the living crap outta EXT*
I use Reiserfs for the small boot partition then XFS and it just behaves correctly ALL the time .
This may be slightly off topic but this my experence with EXT systems total unreliabity