The Yahoo Search Blog announced a "weather report," signifying a search update was taking place. No one really noticed anything, not until last night - at least.
Last night, I saw a post at WebmasterWorld reporting that the "Serp's are on the move." Member, Vimes, said:
any one else seeing the serp's move, from my location I'm seeing the weather start to change looks like I'm expecting bright spells with a little rain later ;)
No one else replied, nor do I see any other discussion in any of the search marketing forums I track. But Yahoo did tell us to expect changes a day ago:
We'll be rolling out some changes to our crawling, indexing and ranking algorithms over the next few days and expect the update will be completed soon. As you know, throughout this process you may see some ranking changes and page shuffling in the index.
Good luck with this update.
Forum discussion at WebmasterWorld.