Is anyone else experiencing shimmering previews

[Nigel O’Neill]

I have noticed that the preview in Vegas Pro 9a tends to shimmer. I am working in an HDV only project (no AVCHD). It is exaggerated by any camera movement or pans and is quite disconcerting to watch. At first I thought it was rolling shutter, but I use CCD cameras. I disabled the Adjust Size and Quality for Optimal Playback setting in the preview window and the shimmering remains.

I then imported the same footage into VPro 8.0c and have no such problems. I was hoping that 9.0a would address such playback/preview issues, but that does not appear to be the case. Is anyone else experiencing this?