OK... I'm glad it's not just me with the white-outs. But honestly, I feel like my (rather new) 4GB RAM machine is now the very minimum that will run Sonar X2. If I preview 10 or 20 loops, then try to Run the palyback of a sequence, I have a high risk of a white-out or at least a drop out.
Looks like I will have to upgrade to Win64 and 16GB RAM (or more) soon.
But so far, liking X2.