We are running Premiere CS4 with Windows Vista Ultimate 64 on a Dell workstation. The Blackmagic Intensity Pro card has been a disaster. First it did not work except for audio. Then earlier this month Blackmagic put new installer/drivers on their website. It crashed our clean workstation during attempted installation – several times. Eventually got it installed but the video output from the timeline still is non-functional through the Blackmagic card. Blackmagic offers no solution. Friend at Adobe and another at one of the UK PC magazines suggest their 64bit drivers might not be completely right yet.
Otherwise Premiere CS4 has been completely stable. I just wish Blackmagic would get their act together; they are normally on the ball.
Tony
Green Room Productions London UK