[Notspot]

As Kaus said most advice you get is great - there are some very generous people out there sharing their knowledge....but....

I was once told that google sees 'name' / 'target' tags (you know, where you put a link on a page to a specific portion of a page as a quick shortcut) as a separate page and so it will consider any page where you've used it as duplicate content.

eg: href="thispage.html" would be seen as a different URL to href="thispage#thisimportantbit", so G would think there are 2 versions of 'thispage', hence dup. content.

I got into a real tizz about it 'cos I use them really often. Spent hours researching it and ending up posting on the google webmaster boards. Needless to say - it's complete rubbish.