On a similar note, I've just picked this up from Gamestation. Got home, installed it and when it starts to download the latest patch it tells me to insert the original disc, not a copy.
Not impressed. Reinstalling now and keeping fingers crossed, I've been itching to play this all day.
Edit : There was a smudge on the disc so I gave it a clean. Installed second time round.
Phew. Disaster averted