COLLADA importer

Hi !
with the 1.6.1 I’m retrying to use dae2egg in our pipeline.
I have problem with some meshes that we have created ourself.
dae2egg forgot a lot of triangle and place other incoherently.

but this mesh pass the collada coherency check ( and import in maya correctly using the collada importer)

the dae2egg doesn’t display any error. Any idea ?