Not to be outdone by Google, Bing seems to also be updating. I spotted at least three different threads, in three different forums, discussing how these webmasters either had no rankings in Bing prior to the other day and now have excellent rankings or had great rankings and now have poor rankings. This is a clear sign of an update, when you see several different forums discussing this, with so few webmasters actually looking.

The forum threads are at WebmasterWorld, HighRankings Forum & Bing Community thread. Here are excerpts from some of those posts:

Have you noticed a major update in Microsoft’s Bing search engine?

Forum discussion at WebmasterWorld, HighRankings Forum & Bing Community.