Apologies if this is old news & everyone already knows it but me. PayPal emailed me yesterday about the change - which came into effect on 3rd March.
Rather a dirty trick, especially as there's not a lot you can do to avoid it other than PayPal's kindly advice that if you don't like it feel free to close your account. As posted on a US site, it potentially would mean a loss of $29 on a $1,000 return. Ok I personally am only down £2.31 on a transaction from the 10th, not a small fortune, but hey, it would buy you a toilet roll or 2. Maybe.