Hey Crytek, most of the videos of the grain glitch haven't really demonstrated how salient the grain glitch is so here's a video that shows it a bit more clearly. Please bare in mind that even this video doesn't adequately capture how bad is really looks; it looks like a low quality streamed video is playing over the image (large rectangular blocky artifacts) coupled with lines going across the screen.
http://www.youtube.com/watch?v=euNnrBeZwdY&feature=youtu.be
I don't know why the embed video isn't working so just check out the link.
Please fix this in the next update as it's really ruining what should be an amazing SP experience.