De indexed pages - can anyone see anything wrong?

Hi Guys

about 4 months ago we had a site redesign and changed urls etc. Set up 301's to all the new pages and slowly we got new pages indexed - up to about 80 in the normal index with 300 or so in the supplemental.

Then suddenly google started de indexing the pages like this one www . legends-online . com/ebay-Autograph-authenticiation.html a pretty unique page for our site with some good content and it was indexed and ranked well up to about 10 days ago then it was dropped.

The page is linked directly to the home page and is about one year old - the site itself is about 4 years old so that should not be a problem.

Any ideas why this or any other pages on our site should get removed from the index?

Cheers for any help you can give.

Could be a rollback or low PR. Could be a duplicate content issue. Copyscape seems to think so.

Hi

Thanks for that - this is my article that was partly taken from the page and published after the original page was put on the site - would this cause a duplicate penalty?

also - lots of other pages have been de indexed in the last couple of weeks - pages that have been in the index for 3 or 4 years.

Can't figure why at the moment.

Could it be anything to do with my server being slow at this time of year?

Thanks for the reply.