Payflow Gateway Update Beginning September 2009, PayPal will be upgrading its Payflow gateway service to a new, more secure SSL server certificate hierarchy. For your merchants to continue processing transactions after this date, it’s possible that you may need to update your current inte ...
Pinnacle Cart Knowledge Base 
Bug Fixes 3.3.3 - 3.3.4 (5)
Update for payflow pro gateway for cart versions 3.5.4 thru 3.6.2