A WebmasterWorld thread has some SEOs and webmasters talking about a possible Bing index or algorithm update that took place yesterday.
These are webmasters and SEOs who joined the forum back in 2003. So they have some history.
One said:
The other replied saying his ranking remained the same but the ones below him did shuffle around a bit.
Did you notice traffic or ranking changes related to Bing?
The last noticed possible Bing Search update was in September 2010.
Forum discussion at WebmasterWorld.