Hi,
I just realized I never update that post, sorry.
Well, I don’t have wpml support access for now, so I can’t tell you.
It was actualy a bug in woocommerce itself, a race condition in stock updates that provoked that desynchronization with wpml.
There is a fix in woocommerce:master for that (it has been there for a long time) BUT apparently it will only be apply in 2.2.
https://github.com/woothemes/woocommerce/commit/ca9955fa9ab5816f3bbcd9e26e931819844c0293
I fixed it manually, mostly because of the desync problem in wpml that come out that, so I would be happy to know that you have fixed the problem (at least for wpml desync).
I may use it in the next update.
Thanks.
