Problems with 'Public Enemies' picture quality?

[Rhylliam]

The disc is fine. The poorly or low lit scenes will produce more grain, thats just how it works with HD cameras.

I DID however have an issue playing the film on my 1080i set, since it produced vertical lines in many, many shots. Switching my set's output to 720p corrected this & made it look fantastic actually. Had this issue with early HD DVD Paramount discs too.