I read about this on Monday 5th March, which is I think the day that this change happened. I had just bought a UK O2 voucher.
http://155.libero.it/pls/portal30/w1...ributiRicarica
I concluded that the change did not apply to international top-ups, and this turned out to be true: I had €5 deducted.
The international recharge page still shows the deduction:
http://155.libero.it/pls/portal30/w1....item?id=12406
Whether this is deliberate or accidental on Wind's part who can guess?
Dave