Had the same worry myself last week, when I opened my very last pack of strips to find they were different. Rang 2 local pharmacies, and neither pharmacist had any info which was disappointing. Like u, I tried one and it worked, and then had a look on the website.
The packs are a different colour and the test strips a different shape, so I'm sure we're not the only ones who were confused. I would have expected a pharmacist to have been informed about the change though.
Jus