JohnWilson,

It's the same issue the other poster had using Word. He was looking for duplicate phrases. I can type in a few words and find nothing, or can type in a different phrase and find three duplicates. The document was created using all cut-and-pastes from other documents, and some of those other documents were at different revisions, so their words were copied in, but also words from their later revision. FIND is good for when you know what to look for; if you are just looking for ANY duplicate phrases, it doesn't do that so well.

HTH.
leaning