starec - 2:46 pm on Apr 4, 2001 (gmt 0)
I read many times about filtering out the duplicate pages, but it is not all true. I changed the url forming recently, and yesterday i discovered that I have all pages, perfectly identical, indexed twice. Gives me opportunity to research the algo a bit, see why some of them rank better than other (the only difference being the url)... So my advice is: give it a try!