When I use an image for a background I noticed that when rendering into a movie it flickers. What it does exactly is one frame the image is normal in another the image is slightly blurry. See Attached images.
This is a Bug. I have found it does it in both 2.65 and 2.65a and 2.64. This should not happen when rendering out to a video. I notice not all images do this. Most seem to and I can’t find anything that is the exact same on all the ones that do.