I've noticed some changes to some fragrances, especially recently, but I don't know if they correlate to the label change.
I did go out of my way to get Arabie in a bottle with the old label only because I believed it more likely to contain the formulation I remembered testing a year or two ago. I can't be sure when the "recent" changes occurred though.
I've got no idea how to decode the bottle numbers but I have noticed (on the rectangle export bottles):
- the older bottles (Shiseido-iconed) have sticker labels underneath with number
- those released as Haute Concentrations do state this on the small label under the bottle, so those that have become Eau de Parfums would appear to have changed concentration
- the first of the current bottles have an etched label/text underneath rather than a sticker with the number on the short side
- the current bottles also have an etched label/text underneath but the number is on the long side under the text