ergophobe - 3:13 pm on Mar 2, 2011 (gmt 0)
First we would need to know what the duplicate URLs look like. There could be several reasons
- that page could be accessible by two URLs
- that page was at the top of the "current" list when the site was crawled and it was effectively both its own page and the category page.
So first find out where the dupe titles are coming from, then find out if other pages could have the same problem. Then we can look to finding a solution.