I tried it with a blur of 35%, both horizontally, and horizontally + vertically, with the hack and driver 197.75 and have no problems.
What driver are you talking about? Sorry, I've seen it on the site, but have not yet installed it. I'll await the WHQL version next week.
Nvidia.com has new R256 drivers Beta for Win 7 64-bit.
I've only been playing with it for the past 1/2 hour or so.
I just noticed that GPU utilization is at 99% now with effects piled on. Never had it up that high with previous drivers. Maybe the new drivers are more optimized for CS5. GTX 285 users may see some performance increases.
When you add GPU gauss blur beyond 5-10% the video stream goes black during preview.
Kind of expecting things to be wonky since this is a Beta driver + the hack
I can confirm the problem with Gaussian Blur with the beta driver.