Duplicate content issues are one of those plaguing issues that SEOs have to deal with often. Often, Webmasters are unaware they have a duplicate content issue until it is too late. Yes, by too late I mean, your pages are dwindling down in the index and your rankings suffer. So what can you do?
Well, there is a new tool out named Site Wide Duplicate Content Analyzer;
This tool crawls your entire site and then analyzes all your pages for duplicate content. It shows similarity percentage among all pages on your site, so you can see what pages are similar enough to trigger a flag in major search engines and consequently they can penalize your site for duplicate content.
I didn't try it out myself, but give it a whirl. Any comments or feedback, discuss at Search Engine Roundtable Forums.

Comments:
Sajjad
01/06/2007 10:39 am
I have used this tool and found useful for my large websites.
Max
07/18/2007 01:04 pm
I am unable to locate a working version of the tool. I even considering funding the development of a similar tool. If you know of anyone who can develop such a tool (and I mean can do it) get in contact here.
Max
11/27/2007 02:43 pm
The ability to effectivley detect duplicate content is a must when approaching SEO. Anyone know of another tool except copscape etc.,
Jon Wade
02/25/2013 10:25 pm
seojunkie.com appears to have gone. Searching for another tool.