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-- Bing Search Engine News
---- Broken results count in Bing SERPs.
Sgt_Kickaxe - 4:56 pm on Sep 1, 2012 (gmt 0)Thread source:: http://www.webmasterworld.com/msn_microsoft_search/4489714.htm
I think there are too many things going on all at once to be a very effective test, my guess is that their method of inserting(or removing) a site manually is inadvertently changing the results, numbering etc.
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