[ahoyhere]

If you take it to mean human nature and the completely cyclical patterns of human behavior, then it's most certainly correct. That's how I've always interpreted it.

[davidmathers]

Verse 9 is about behavior:

  What has been will be again, 
       what has been done will be done again

Verse 10 is about things:

  Is there anything of which one can say, 
       "Look! This is something new"?

I think verse 9 is false. Remember one of the ways Solomon got his pleasure: "I bought male and female slaves and had other slaves who were born in my house." That's the only thing I can think of though.

[ahoyhere]

Why does the case of Solomon's slaves negate verse 9?

There has always been slavery, and there is still slavery today, and lots of explicitly sexual slavery too.