bitcoin/bitcoin — pull request #3353 by gavinandresen (2013-12-04 04:14:27+00:00)
Title: Payment request URI syntax changed, from request=... to r=...

BIP 72 was changed to save six bytes in bitcoin: URIs.

I updated the Handy Dandy Payment Request Generator page at https://bitcoincore.org/~gavin/createpaymentrequest.php and run a couple of -testnet tests.