7. The method of claim 6 , wherein scanning the first plurality of documents is performed in a background thread while documents from the second plurality of documents are being browsed.
7. The method of claim 6 , wherein scanning the first plurality of documents is performed in a background thread while documents from the second plurality of documents are being browsed. 8. The method of claim 7 , wherein scanning the first plurality of documents includes scanning documents stored in a local history cache.