[vaurora]

Trying to figure out how to apply Charles' Rules of Argument to the situation, I realized I wrote an entire article on this topic (and linked to it from the OP):

http://lwn.net/Articles/351422/

Short version: ext4's behavior under default mount options changed. You can't blame it on someone mis-reading the docs.

[Dylan16807]

The actual behavior is orthogonal to the guarantees in the documentation.