I have recently started using after effects CS5. Every time i render frame glitches appear in the form of white noise static on singular frames and also random timeline frames that are no where near that particular section. see footage example below, its a short vid but you get the idea.
the glitches seem to be more constant at the begining of the render as you can see in vid then they seem to happen for a couple of frames for approximately every 10 - 20 seconds.
I have tried updating CS5, playing around with memory and multiprocessing, purging cache before render, allocating more cache.
Here's one simple thing to eliminate: if you use Open GL to accelerate rendering, turn it off. Even the folks at Adobe don't use it. Then try the render again.
No luck? What's the media container (AVI, QT, etc.) and the codec of the video in the project? I ask because AE 10 is reputed to handle long-gop codecs, but not yet definitively proven to be able to do so. The fix would be to convert the video to a high-quality codec using something other than AE.