Inaccurate?

Improved Resiliency

( Races of Eberron, p. 119)

[Warforged]

You gain a construct's resistance to nonlethal damage.

Prerequisite

Warforged,

Benefit

You are immune to nonlethal damage but lose the ability to benefit from regeneration or fast healing, even if you would gain those qualities through magic or the application of a template.