I noticed that too
On another note, I wish people would knock off this pay me by Masspay nonsense. It is a hassle and probably against the TOS to use it like that. But more importantly, it is easier to just use the "personal payment - payment owed" option. It still results in zero fees, it is easy, and it is a proper use of PayPal, since we are friends, and this describes exactly what we are doing.
There is no buyer protection this way, but you wouldn't get much protection for a domain sale anyway.