Quote - ...

[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals

[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals

[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals

[2010-08-18 17:54:41 Warning: 43] Inconsistent shading normals

(-snip lots of that-)

In case somebody wonders, according to the Lux devs this is due to "tightly placed vertices and stretched out polys [which] lead to false alarms of inconsistent normals".

In this case, V4's head with its small polys most likely looks suspicious to Lux's importer.
Full thread here: http://www.luxrender.net/forum/viewtopic.php?f=27&t=4359